In the beginning of the year I was listening to so much stuff, but the second half I barely listened to anything for some strange reason so I can't really make a valid list
Off the top of my head and from reminders of what came out in 2007, in no particular order
Favorite Albums:
凛として時雨 - Inspiration is DEAD
World's End Girlfriend - Hurtbreak Wonderland
B'z - Action (Probably cause I heard it recently)
(And a couple western albums)
Favorite Songs:
凛として時雨 - i not crazy am you are
World's End Girlfriend - 百年の窒息
Ami Suziki - FREE FREE
チャットモンチー - 真夜中遊園地
BaseBallBear - 抱きしめたい
ミドリ - 愛のうた
東京事変 - キラーチューン
銀杏BOYZ - あいどんわなだい(probably cause of the PV though lol. btw, anyone wanna hook me up with the single? >_>)
9mm Parabellum Bullet - Discommunication
Listening to Kamomekamome's album right now and I have to say, I like it alot, but haven't listened to it enough to say it's one of my favorites. One of the best metal-core releases of the year for sure.
Maybe I'll update later.