Let me preface my question by declaring that I?m older than a boomer.
No need to be any more precise than that. :)

Understand, too, that, when it comes to singers of pop music, I?m more
in tune with the crooners of yesteryear than with today?s screamers,
grunters, croakers, and all other alleged singers who value stylistic
affectations above tonal quality and for reasons I don?t pretend to
understand. Although I don?t believe any of the below listed singers
could carry Bing Crosby?s or Frank Sinatra?s suitcases, I?ve always
been curious as to what it is that attracts the fans of each and what
those fans might have in common. So, on to the specifics of my
question (bet you thought I?d never get there).

How would you profile the fans of each of the following in terms of
their age and shared interests? Stated otherwise, what do Barry
Manilow fans have in common, and so on for each of those listed?

Tom Jones
Wayne Newton
Jimmy Buffet
Roger Whittaker
Barry Manilow
Elton John
Billy Joel
Slim Whitman
Bruce Springsteen
Bon Jovi
Prince
Neil Diamond
Rod Stewart
Aaron Neville

And now it?s time to slip a Sinatra CD into the player. :)

Yikes. I like all of those guys except Wayne Newton and Slim Whitman.
I hate to think what that says about me. :-D

I most certainly have noticed certain shared qualities in the fans of
these different singers. As the site administrator of
OnlinePopstar.com, an online karoake site, I listen to karaoke
versions of songs by these legendary artists performed by some of
their most avid fans!

We have an online singer's forum called CyberStars where a lot of
discussion takes place on favorite singers, music styles, and general
chit-chat. From these discussions I have gleaned some very keen, and
often, humorous insight.

Let me preface my answer by stating the obvious; the fans are as
wonderful and as distinct as the artists themselves and my
generalizations may be just that: general.

However, my years in the karaoke industry have allowed me to meet a
great many very passionate music fans. Like everyone else, I can spot
an Elvis fan at 50 yards away; unlike everyone else, I can also easily
pick a Van Morrison fan out in any crowd (he's usually not quite
sober, of Irish or Scottish descent.)

I will do your question by one better. Not only will I attempt to cite
some commonalities in the fans of these singers, I will also add what
I believe would be their beverage of choice!

Below, I will profile the fan base of Tom Jones, Jimmy Buffet, Elton
John, Billy Joel, Bruce Springsteen, and Bon Jovi.  I will leave the
other artists for someone more knowledgeable than I am.

Tom Jones fans are in their 60s and have steadfastly clung to their
1970s culture. No slaves to current fashion, the women have meticulous
bouffant hairstyles, wear ornate displays of cosmetics, and
cleavage-baring two-piece pant suits. The men still sport their jaunty
sideburns and their gold-chain entangled chest hair is displayed by
the open-front silk shirts they wear. These fans have all been
divorced 2.8 times. They are rarely wealthy, but never poor. The money
that they should spend on family therapy is instead spent in Vegas.
Tom Jones fans can be spotted Seagram's 7 & 7.

Jimmy Buffet fans are in their 40s and 50s. They were half-hippies in
the 70s, they bought the Free Love concept but lacked the idealism
then that they now display so fervently in their numerous humanitarian
works. Usually enjoying life from the upper-economic status, these
fans have taken a laid-back approach to life and have surprisingly few
wrinkles. Most Buffet fans are college educated. Many have become
teachers and professors as they need to have full enjoyment of their
summer vacations. Collectively known as "Parrotheads," these hawaiian
shirted, flip-flopping kids can most always be seen with a Margarita
in both hands.

Elton John has a lot of gay fans. He has many more straight fans. Sir
Elton fans defy any demographic for age as his musical genious has
garned love from people since the early 70s. The next generation of
his fans are listening to him sing during their Disney movies. His
most avid fans are all rich and famous, which is a good thing as your
average person really can't afford his concert tickets. Elton John
fans drink anything from Chardonnay to chocolate milk in sippy cups.
Elton John fanatics do NOT drink; they are working a 12 Step program.

Billy Joel fans are the blue-collar working-class realists. In their
30s and 40s, his fans relate to his humble beginnings and, like him,
they are tough on the outside with hearts of buttah.  No matter what
socio-economic status, Joel fans are all down-to-earth; it ain't
pretty, but it's real. You can spot Billy Joel fans in a crowd wearing
baggy pants,t-shirts, and baseball caps. If the crowd is devoid of
Joel fans, it's because it's a beautiful boating day and they're all
out on the water. Joel fans usually drink Long Island Iced Tea.

Bruce Springsteen fans are the blue-collar working-class dreamers.
Also in their 30s and 40s, Springsteen fans are idealists. They
believe that dreams come true and, despite quiet inferiority
complexes, tend to be tenacious in whatever they do. They very rarely
divorce. Many are self-employed. Springsteen fans tend to be quiet
loners until they gather at one of his frenzied concerts; this is when
their collective pain-spattered idealism erupts into cataclysmic joy
in the emotional abandon that is reflected from their hero. All Bruce
Springsteen fans can be spotted wearing too-tight Levis with boots.
The obvious choice of beverage is a Bud.

Bon Jovi fans are female. They are those 30-something girls who are
stuck in the 80s; the crowning glory of their tanning booth tone is
their Frost-N-Tip hair, teased out to glorious heights and secured
with 16 ounces of Aqua-Net hairspray. Most of his fans smoke
cigarettes and chew gum at the same time. Bon Jovi fans believe his
lyrics and are modern-day Cinderellas, waiting for their Cowboy to
ride in on his steel horse and rescue them from a never-ending
adolescense. They tend to be overly-friendly touchy-feely type people,
usually nice, but never mean-spirited. A Bon Jovi fan will always
order a Fuzzy Navel.

There you have it. A concise fan profile of some very legendary
artists. I have presented my thoughts and ideas as would any decent
Billy Joel fan; I gotta tell it like it is!

If anyone reads this and wants to yell at me, Online.Popstar@yahoo.com
is my email address. I'm tough, I can take it.  In any event, come
visit me at OnlinePopstar.com for a rockin' good time!

Onlinepopstar, what an enjoyable response! Though I'm in no position
to vouch for your analyses, if you were a GA researcher, I'd ask that
you make it your Answer. Tell me this: I've always been curious about
the demographics of New Age music fans, too. How would you describe
those who like Yanni and John Tesh? The latter has always impressed me
as a purveyor of amplified elevator music.

Based on a survey of one (myself): 

Tom Jones - cross-generational genius. My mother likes him, I like
him, when I'll have a daughter, she'd love him. I'd portray his
audience as mostly women of all ages. But then again, now that I come
to think about it, not only women. He's also a peace maker : do you
know Space's "The Ballad of Tom Jones"? If not, you must.

Elton John - also a genius of a sort. I think that his fandom includes
gays, older women, and people with cheesy cultural taste (like yours
truly).

Billy Joel - yuppies and geeks. 

Bruce Springsteen - hmmm... Some of his fans are also yuppies and
geeks. However, probably nowadays, with the return of his social
critique, some leftie children.

Bon Jovi - Females who are 16, people who still live in the 1980s,
people who have bad taste in clothing, men with hair (you know what I
mean), and generally - good people who want to feel that they are
actually bad.

Prince - My favourite JW (sorry pugwashjw. You come in second,
though). A real genius. People who like good music and have no
prejudices.

Neil Diamond - My mother? Or was it Neil Sedaka that she likes? In any
case it wasn't Neil Young.

Rod Stewart - people who think he's sexy? Also people with bad taste
in clothing (see Bon Jovi) and people who live in the 1980s.

Aaron Neville - yuppies of the worst type, computer engineers and
other geeks. He is probably played in Google headquarters.