I'm enjoying ac3 a lot personally, couple of bugs but nothing major. Minecraft on 360 is much simpler to grasp than pc as all the crafting is done for you, I prefer it even though it's not as far along update wise.
I'm torn between starting Assassin's Creed III on the Wii U and Minecraft on the 360. I didn't think i'd enjoy the latter, but the demo went down well. It seems to be massively tutorial heavy though, which is why I haven't jumped right in, but it's something to play with the girlfriend when I can explain the complexities.
On the other hand, it's been over a year since I played AC2, which I love.