Of that list, ESB is the only contender even worth consideration.
It isn't really a plot twist per se but, my personal favourite is thus: "Major Strasser has been shot. Round up the usual suspects." The quote itself doesn't make sense out of context, and really doesn't make any sense in context if you haven't seen the rest of the film. Sadly, I'm probably the only person on these forums who knows what that's from...
I didn't make it!
I know what movie that quote is from C38368. It is Casablanca. My vote goes for Usual Suspects.
I'm gonna have to go with Memento on this one...although when I saw Saw for the first time I was a little surprised at that twist as well. I really dont think Se7en needs to be on there though...how does it count as a twist really? It's more of a continuation of the plot and doesnt come as much a surprise
Donnie Darko had a bunch of good twists. When i watched it the first time i didn't know wtf was going on.
Scarface had a good twist at the end too. When I first watched it I thought Tony would end on top.
'The Village' - Though it was a fairly boring film, it had a good twist to it.
I like the Twists in Psycho and Jacobs Ladder