The first CGI movie you'll be seeing?
Man that's sad - CGI movies have become commonplace and some of them are fantastic - Toy Story 1 and 2, Incredibles, Monsters, Inc., A Bug's Life and Cars. Everything else besides Ice Age is basically a bad attempt at cashing in - Madagascar, Robots, Ice age 2, the wild, chicken little, etc.
The thing about Pixar films is that they actually have great simple stories but emotionally effective - they have heart and some of the most easily relatable films ever made - which is why they are so good and so many people like them. Oh, yeah, plus the animation is the shiznit too.
Some wanker on IMDb said that Pixar films become to convuluted due to everyone pitching in - um...no, it works the other way round (I should know)...you work on something alone - and thats it - it's gone to hell...you work on it with people you get more and more and better and better story points.
Therefore - I am thoroughly lookign forward to this and love the concept of a rat becoming a chef when they always shoo rats out of the kitchen.
It's not the concepts that are brilliant (as they are pretty normal concepts, monsters, toys, fish etc) but what they do with it and how they write it.
Oh sorry - in a theatre. I was just going to suggest watchign both Toy Storys, Monsters, Inc., The Incredibles and Finding Nemo - all five their best films. A Bug's Life and Cars are good too, but they aren't "the best" if you understand - they aren't as good as their predecessors.