Still working on Rahxephon, but I'm also watching Princess Tutu now. I'm really enjoying both. I'm not really into mecha anime, but I like existential stuff, so... I like the characters in Rahxephon. I know they tend to be angsty in stuff like that, but Ayato isn't like that. He's a really likable character.
Tutu is also interesting. It's weird at first, but it gets better. Ahiru's a typical mahou shoujo, pretty Mary-Sue-ish, but she's not annoying. I know how the shipping goes, and I like it. Only... I heard the story has a bitter sweet ending. I don't know what that means, exactly, but I hope the shipping turns out ok, at least. Hm... yeah, it has really good music, too.
Oh, that's right, both of these anime focus heavily on music. That's a funny coincidence.