I will buy any soundtrack that credits Yasunori Mitsuda or Akira Yamaoka. Favorite albums include Chrono Cross, Xenosaga I, Silent Hill 3, and Donkey Kong Country 2 (David Wise, I think?). And while it's not a video game soundtrack, Kirite (Mitsuda) is an amazing collection of celtic music.

Lately I'm listening to a lot of Kong in Concert, the fan DKC remix album. Also, while I hated the soundtrack to FFX, there's a fantastic remix of People of the North Pole on OCRemix called Journey's End. I can't stop listening to it.

http://www.ocremix.org/remix/OCR01381/

<3