Well, films these days just blow chunks, it's all freakin' Massive armies and stupid looking digital characters. They're all guilty - take a good long hard look at Lord of the Rings (all 3 of them). The 1st movie had some whoppers in it, I tell you - like that shot on the mountain, the heroic fanfare plays and they walk past badly-composited mountains in the background and it looks like *dreck*.
Then there's The Two Towers, right off the bat you have that silly battle with the Balrog (looks ridiculous, I've never understood modern filmmaking fascination with 'digital doubles') & that pathetic shot of Legolas leaping up onto a horse (what the hell was with that? On the DVD they talked about it like it was really good, I thought they were joking but no - no punchline) and how's about the end battle? Gandalf at the top of a hill (if you look at the grass on the hill, you can see someone has been Clone-Stamping it in Photoshop). Nevermind the shot where he says 'the Battle for Helms Deep is over'. If you want bad compositing, look no further than that shot.
Return of the King... thinking... there was a lot of good stuff in this movie, like the first two, but my word some things were rotten. Like that boneheaded sequence where Legolas takes down the big elephant thing. Again - why do they think I want to watch someone render Legolas out of Poser and make him leap around like an idiot? This guy has absolutely nothing on Errol Flynn. To wit, Errol Flynn (digital or not) would walk onto screen and kick his arse.
I won't even bother with Star Wars, you've all hit the nail on the head already. But I thought I'd remind ye all - the problems aren't confined to one movie. This CGI crap is everywhere.