My favorite's Assassination Classroom, but I think it's only available on Hulu. It's really strange, but once you get past the first five or so episodes, it's really good. Also, there's one early episode that has some pretty mild sexual themes and is just generally bleh; however, it introduces an important character and makes much more sense later on. So don't get turned off of it by that. It gets much, much better. Well, assuming you can find it