The music from Clannad is suuuu pretty. All of it. A Large Family of Dangos, su kawaii!
Cowboy Bebop, was unique in the music department, not what you usually see in anime, loved it though. The Naruto Shippuden OP (English) the OP sucks, but song is catchy! FMA OPS, all of em were good. Iunno the names haha.