I’d have to say I really like Bleach’s starting sequence. The music and the animation are great. The .Hack//Sign starting sequence is what got me into the whole series, cuz I loved the music. Also the RahXephon sequence is really cool too, b/c if you pay close attention you can figure out a lot about the series just by watching it. i dunno, it seems like i can tell how good an anime is going to be looking at the start.