This really should be in a journal, but I'll let it slide this time.
I'm partial to J-Rock myself, especially the work of Anna Tsuchiya and Olivia Lufkin, they both did the music for the Anime Nana.
I only wish I could get my hands on the rest of Olivia's work, but I only have the album from Nana, and her latest studio album Cloudy Dreamer. Her album "Comatose Bunny Butcher" really intrigues me.
Also, pick up the sound tracks for the anime K-On! Good music even if it is a bit childish at times, And will get you some weird looks if you're playing it in your car with the windows rolled down ^_^;