I loved it! I saw it twice, haha.
I can't wait for the next one; Cameron has already stated that he was going to make not one, but two more. I've also read that since the technology has been perfected (as well as all the extra details like creating Pandora and the Na'vi language completed) in the making of the first, the second and third will not take as long to make, and Cameron will be able to focus on the stories this time.

So exciting!