I loved the first reel of Up, but HATED the rest of it. At the top of my list of least favorite of the year. So there you go.
Even though I would never have predicted it, I have to say Star Trek too. We got it on Netflix, and after watching the movie, watched the commentary and features, then watched the movie again, back to back. Then we bought the 3-disk special release two days later (with free shipping - thanks, Amazon Prime!), and watched the rest of the features - really wonderful stuff that no fan of behind the scenes stuff for ANY movie should miss...and then of course watched the movie again. It was exhilarating. I'm on the road at the moment, but when I get back home, will be watching it again.
I haven't seen it on any year-end lists, but I also really enjoyed the new Harry Potter. Dark stuff, but well told, and gorgeously shot.