Umm I'd play anything always up for something new
Things I've played
Table top RPGs (played)
Mutants and Masterminds in a heroes esque universe
Marvel RPG (the card based one) in several universes
D&D 3.0/3.5/4th Homebrews and planescape orientated ones
Whitewolf Vampire, Demon.
Star Wars (D20) Episodes 4-6 era
Shadowrun
Ars Magica
Cthulu
Tribe 8 (apocolyptic future with "demons" and a group of self serving "gods" )
Nobilis (diceless system where you play gods of aspects for example nobilis of nightclubs or laughing)
DM'd tabletop
Mutants and Masterminds in the cowboy bebop universe
D&D 3.5 Planescape
D&D 4th Ed Planescape
LRP (live role play)
High Fantasy based at least 4 different systems
Vampire 2 different systems
Cthulu
MMORPG
WoW (well it was on a roleplaying server

)
Pretty much every game has been realistic no glossing over the bad stuff, though the DM of the Tribe 8 game hit the hardest and that was fun.
Infact having thought about it I would be disapointed with a DM if all it was was you slay the dragon you get the treasure hurrah! Gimme guts and blood, gimmie crimes give me moral dilemas, give me a reason to hate the bad guys, make me think and let me experience new things!
All of the games I've played I've really enjoyed too, I don't really understand people who like the same thing again and again, I find it too boring give me something New! I want to see/experience as many different things as I can before my times up
I really want someone to run a Warhammer 40k game now don't care what system they use, but the likelihood of it happening isn't great
Well to sum it up, try something new today is my recommendation
