I have seen 2 3D movies, Coraline and Bolt. CORALINE IS TEH AWESOME MOVIE AND BOOK! And I love all of Henry Selick's work, GO NIGHTMARE BEFORE CHRISTMAS!
I really hate 3d. When I went to see Coraline I refused to watch the 3d version because I think it ruins the film. But the only half decent 3d I've seen is Spy Kids 3d, and I was less critical and a lot younger when I watched that.
I would say Journey to the Center of the Earth, but frankly, the 3-D you get when you take it home is that stupid red and green thing that's annoying as heck. I only like them in Real-D. I might see Up in 3-D though...