Well, lots of stuff by Yasunori Mitsuda comes to mind...
The Girl who Stole the Stars is one of my most favorite compositions by him. But then I also like all the music from Xenosaga quite a bit, and ... There are simply too many to list, by other composers as well.
Some Final Fantasy music I like quite a bit, although to a lesser degree than any Mitsuda, and same goes for Ys music, although I might like most stuff from Ys better than FF.
Then, there's always Nintendo music... which there is really too much of to say what's my favorite.
The universe is permeated with the odor of turpentine.