I'm a big fan of prequels, even though it is usually quite confusing and half the time you try to find errors and holes
I really enjoyed Star Trek, one of the most fun (funnest?) of the entire Star Trek movies.
Also Terminator Salvation which is a sequel packed into a prequel, or vice versa. Christian Bale is just amazing. But despite it all I found the action in T3 to be almost more intense. The scene with Arnie hanging on to that big yellow crane thing is just mind blowing. I guess it's because so much of "everyday stuff" gets destroyed and I can relate to that a lot better than some futuristic vehicles exploding.
And wall-e is on pole position of my "best CG movie of all times". Soooo qwute!