Nobuo Uematsu is a favourite composer of mine.
I listen to Final Fantasy music. Nobuo Uematsu FTW! Here is a link to the Final Fantasy: Distant Worlds 2011 concert performance - Vancouver 2011. http://www.youtube.com/watch?v=rPx5_I8KfNM
The songs in Final Fantasy X and X-2 had me singing Koda Kumi songs for weeks. Singing in Japanese is fun, especially when you don't really understand the words.
I have also picked up a lot of new favorites from the playlists on car radios in games like Scarface, GTA and Need for Speed.