So, your iPod/iPhone, Zune, lesser name-brand MP3 player, what have you... what albums do you have on it?
Here's what I've got (Keep in mind that I've got a last-gen 4GB Nano, so this'll probably be easier for me than those of you with "larger" iPods.):
Bad (Special Edition), Michael Jackson
Bat Out of Hell, Meat Loaf
Bat Out of Hell II: Back Into Hell, Meat Loaf
Bat Out of Hell II: The Monster is Loose, Meat Loaf
Batman (Original Motion Picture Soundtrack), Prince
The Best of Both Worlds, Van Halen
Best!, Jellyfish
Bound Together
Classic Queen, Queen
The Colour and the Shape, Foo Fighters
"Dad's Smashing Pumpkins Mix", being a bunch of Smashing Pumpkins songs my dad put on a CD at one point.
The Division Bell, Pink Floyd
Eliminator, ZZ Top
The Essential Billy Joel, Billy Joel
Europop, Eiffel 65
Greatest Hits, Journey
Heavy Troopa is Ready to Launch! (two discs plus "B-Sides")
Hellbilly Deluxe, Rob Zombie
Highlights From The Phantom of the Opera
"Kyle's Guitar Mix", some random songs my brother got from his guitar teacher to practice.
"Mario and Luigi", just the final boss themes for PiT and BiS.
"Metroid Metal", a couple of the titular songs by Stemage.
The Mustin Collection, Mustin (et al)
A New World Record, ELO
Out of the Blue, ELO
"OverClocked ReMixes", assorted songs from the titular site.
Purple Rain, Prince and the Revolution
Rise of the Star
Running with Scissors, "Weird Al" Yankovic
"Selections from YTMND", a set of YTMND-related songs.
Smashes, Thrashes & Hits, Kiss
Straight Outta Lynwood, "Weird Al" Yankovic
"T's Tunes", all the songs over the years that I've liked enough to download on their own.
The Wall, Pink Floyd
Welcome to the Neighborhood, Meat Loaf
Wish You Were Here, Pink Floyd
IV (or whatever it's called), Led Zeppelin
"80s Mix", a bunch of 80s songs selected from a sizable series of class reunion CDs of my dad.