Hello, I just registered, and this seems to be a good place to start.
Good question. My musical tastes come and go, usually following whatever anime show I'm watching at the time. I remember the time where I'm infatuated with music from shows like Ranma 1/2, Devil Hunter Yohko, DNA^2 and Kimagure Orange Road. Now I can't get enough of Mikuni Shimokawa's songs in Full Metal Panic and Full Metal Panic Fumoffu.
But if I really were forced to choose my favorite, I'd probably say
Do You Remember Love by
Mari Iijima for the anime OAV/Movie
Macross: Do You Remember Love? The Macross shows has always had great music. Probably because of the basic theme of the story, protoculture and all that.
BTW, tsurumaru, I also like
Yakusoku wa Iranai from
Escaflowne. And the
Rahxephon OP is
Hemisphere, sung by
Maaya Sakamoto. It says so here in my Winamp.