People all hailed Jurassic Park for all of its incredible CG, but the very first shot was so fake looking to me, that my questioning of CG began then and there.

I've said before that I think ships and landscapes do quite well in CG, but organic "living" things never get pulled off believably. Be they Brachiosauruses, Gungans, Gollums, Wargs, or 25-foot Gorillas. They look real only up to a point, and then they just look fake after that. The human brain is amazingly adept at picking out what has crossed that barrier.

I'm amazed at how good the T-1000 looks 15 years later, but he was liquid metal .... adhering to very specific physical properties that a computer could handle. We constantly push CG beyond its limits and it breaks the fourth wall every time.