[Akito Kinomoto]

As disconnected as they might seem, I believe The Skull Man has that same stylistic flair present in Baccano! and Durarara!! It's darker to be sure, but you'll probably see what I mean. I'll also second everything mentioned for K-On!, as well as recommend Hidamari Sketch, Hyakko!, and Best Student Council. The first is a somewhat known-yet-pushed-to-the-sidelines 4-koma adaptation that's aware of its own simplicity, the next one will basically work for anyone who's into over-reactive comedy, and the final one, I find, has a surprising amount of story and is quite heartwarming. Finally, as you have My-HiME on the OP, the obligatory response with Magical Girl Lyrical Nanoha and A's is in order.