Looking for a good manga series?

I've finished reading all my favorites, and I'm on the lookout for new ones. Can anyone recommend one? I liked Yotsuba&!, Hana Kimi, Cheeky Angel, Azumanga Daioh, and Bleach. Please recommend a series that's not too gory, or has any erm, "adult content". Well, something that a 13 year old read. Also, PLEASE NO NARUTO!