I agree with most of the CGI criticisms that have been made. That gungan/robot battle scene in TPM was like watching a cartoon. It was at that point that I said to myself- there's no getting around it, this film is a disaster.

I also am aware of the "weight" issue with CGI. The CGI characters don't move with the same gravity that real people/animals do. The CGI stormtroopers in ANH:SE and the action scenes in the Spiderman movies spring to mind. They just don't look/feel/move like organic beings. It was really obvious when Spidey was CGI and when he wasn't.