I'm obsessed with yet at the same time despise the Lavender Town theme from Pokemon Red/Blue. It's so... unsettling, yet addicting. It also can easily give you nightmares if you've read/watched any creepypasta. As for other games, the Skyrim theme is incredible, and I can't wait for the game to come out.

I can see your point but my post would be off if i wasn't talking about music.

Then be specific in your title or something, it didn't say MUSIC theme or something, just favorite gaming theme, and i answered that.

Game MUSIC not games or genres

Obviously Minecraft
But for gaming istelf
-Shooter: CoD MW2 and BF3

There are too many games I love to pick a favourite. xD
But here are my top ones from each genre
FPS: COD4/RSV2
RPG:TES:Oblivion/FO3
Sport: Skate

Those are ones that jump to mind