Oh, I have a lot.
Total War stuff is more of less always awesome.
(I don't know what to pick really, basically the entire RTW-M2TW soundtrack, especially when you use Stainless Steel.
Also, the menu music of Napoleon:TW is amazing at least to me. It's very dark and moving.)
Hmm, what else.. Ah yes.
Divine Divinity, a quite underrated Diablo-esque RPG, has an AMAZING soundtrack, Kirill Pokrovksy did a great job on it, it makes the game 100% more enjoyable because of the atmosphere it creates. Again, I could youtubelink the entire OST, it's that good. Dunno if it's a good thing to do or not.