I second
REC and
Hare+Guu. I have no idea what the
REC manga was like, but the anime is pretty good and short. You can watch the whole thing in an evening.
Hare+Guu is often hilarious. Also you really should watch
Cross Game. It certainly deserved our
Choice Award for Best Television Series of 2010.
Here are some others I didn't see on your list (in no particular order):
Saiunkoku Monogatari
Shion no Ou
Nijuu Mensou no Musume
Aoi Bungaku
Mouryou no Hako
Hidamari Sketch
Hataraki Man
Bartender
AKB0048