Got limited time, so I'm just gonna link two videos and go:
The crazy insanity that is Lucky Star. (?????) Another product of KyoAni (creators of the anime version of Haruhi Suzumiya), Aya Hirano (the voice of Haruhi), and Tomokazu Sugita (Kyon/Rin/Yuuichi).
Arguably the best anime of this Spring season. And perhaps of this year, if Haruhi season 2 doesn't come out this year.