i haven't read all the posts in this thread, but i'll mention my favorites.
Eureka 7. 'nuff said.
Heroic Age, Last Exile, Ergo Proxy, Ouran High School Host Club, Shakugan no Shana, Code Geass, Wolf's Rain, Trinity Blood, Now and Then Here and There, Darker Than Black, D. Gray Man, Birdy, Rahxephon, Claymore, Full Metal Panic, Martian Successor Nadesico, trigun, cowboy bepop, noein, elfin lied, fruits basket, gurren lagan, xam'd... just to name a few.
btw.. there's a sequel to Eureka 7 coming out this year. Eureka 7: Astral Ocean. It's about a boy with the same powers...hehe. i'm not going to spoil who, but if you've seen the anime you can guess who it is.