Trying to figure out my all time favourite top 25 albums (compilations not included) and Prince has the highest number of appearances with 6 albums.
The full list in chronological order:

Revolver (The Beatles, 1966)
Sgt. Pepper's Lonely Hearts Club Band (The Beatles, 1967)
Magical Mystery Tour (The Beatles, 1967)
Astral Weeks (Van Morrison, 1968)
The Beatles (The Beatles, 1968)
Abbey Road (The Beatles, 1969)
Hunky Dory (David Bowie, 1971)
The Rise and Fall of Ziggy Stardust and the Spiders from Mars (Dvaid Bowie, 1972)
Aladdin Sane (David Bowie, 1973)
Pinups (David Bowie, 1973)
Bat Out of Hell (Meat Loaf, 1977)
News of the World (Queen, 1977)
Off the Wall (Michael Jackson, 1979)
Thriller (Michael Jackson, 1982)
Born in the U.S.A (Bruce Springsteen, 1984)
Purple Rain (Prince, 1984)
Diamond Life (Sade, 1984)
Parade (Prince, 1986)
A Kind of Magic (Queen, 1986)
Sign 'O' the Times (Prince, 1987)
Lovesexy (Prince, 1988)
Diamonds and Pearls (Prince, 1991)
Live at the Point (Christy Moore, 1994)
The Gold Experience (, 1995)
Back to Black (Amy Winehouse, 2006)

Edit takes out the Beatles' Yellow Submarine and puts in Christy Moore Live at the Point which moves Prince into first place, the Beatles now only have 5 albums in my list.
[Edited 8/21/07 17:15pm]

All I listen 2 besides Prince is Metallica.

These are sure featuring in my top whatever of favourite albums...

Prince & The Revolution Parade
Prince Sign O' The Times
Prince & The Revolution Purple Rain
Prince & The Revolution Around The World In A Day
Prince 1999
Prince Dirty Mind
Prince Controversy
Prince The Black Album
Prince Lovesexy

Cheek said:

where is purple rain?

Christopher said:

Up there.

Cheek said:

i knew that.

Christopher said:

Then what the fuck R U talkin' 'bout???

Cheek said:

lolz

Christopher said:

It's #3. Satisfied now?

Cheek said:

i seen it earlier pumpkin

Christopher said:

Kiss my ass then!

There are more than 3 or 4 acts to choose from. Terrible, typical list and the Amy Winehouse is laughable.

Wall said:

Just the stuff I like, a pity none of my Duran Duran albums were good enough to make it.
Which would you keep and which would you remove?

Edit: What's wrong with the Amy Winehouse album? It's the best I heard all Millennium, Mika included. As good musically as the Rainbow Children but with hits also, much like Lovesexy.
[Edited 8/22/07 1:19am]

These Prince albums would be on my list somewhere:

Sign O' the Times
1999
Controversy
Black
Planet Earth


Maybe:

Lovesexy
D&P
Chocolate Invasion

Although I could always make my own Prince CD from my favorite 12-16 tracks
and that album would be in my top 5 forever.

And no i do not include Purple Rain in my lists. I got caught up in the 1984 Purple Rain hysteria back in the day and I almost never play the album now.

After Sign of the Times I rarely have gone back to listen to the old stuff.

Prince is number one in my house, I'm pre-purple rain!
[Edited 8/23/07 2:20am]

He's got 6 in my top 25, 10 in my top 50 and about 16 in my top 100.

Moonbeam said:

Damn! Now that's a complete answer.

I'm guessing that Moonbeam is a whiz at math and shit.

Brendan said:

I teach mathematics and statistics to university kids.

Moonbeam said:

I thought you knew your way around numbers. And I'm pretty sure that qualifies.

Now if only I could get this organized. Ugh. Doubtful.

It's so hard to compare Prince albums to others. How does he fit in here?

Kate Bush – The Hounds of Love
Joe Jackson – Big World
Terence Trent Darby – Neither Fish nor Flesh
Red Hot Chili Peppers – Blood Sugar Sex Magic
Moloko – Statues
Beatles – White Album
The Doors – Strange Days
Jimi Hendrix - Electric Ladyland
FFF – Free For Fever
Cameo – Cardiac Arrest
Ornette Coleman – Virgin Beauty
The Style Council – Confessions of a Pop Group
Pharoah Sanders – Heart is a Melody
Stevie Wonder – Songs in the key of life
Slave – Slave
The Isley Brothers – Fight the Power
Bootsy Collins – Keepin dah Funk alive
Gil Scott-Heron – Tales of Gil Scott-Heron and Amnesia Express
Tom Waits – Swordfish trombones
David Bowie – Young Americans
NWA – Straight outta Compton
Led Zeppelin – Physical Graffitti
The Police – Regatta de Blanc
Wendy & Lisa – Eroica
Paliament – Clones of Dr. Funkenstein

Try to fit in these because I don't dare to do so:

Sign of the times
Lovesexy
Parade
Gold Experience
The Rainbow Children
One Nite Alone (Studio)
0(+>
Around the world in a day
Chaos and disorder
1999