I thought the acting was great - Danny Glover did a great job, I loved Gary Busey and Bill Paxton, and Robert Davi was awesome. Oh, and how can I forget King Willy!
Pacing was very very fast. It didn't have the buildup that Part 1 had, but I'm glad that it didn't, since it wasn't a surprise anymore what the Predator was. It wouldn't have worked. I really liked how the movie kicked off with an explosion and boom, you were right in it till the end.
Story was good enough. It was a little weird when the Predator started knocking off the Columbians and Jamaicans, but it was fine. Didn't care so much that he killed Danny boy though. But in the end, it was a story of a Predator in an urban jungle picking people off. Very similar to Part 1 if you think about it like that.
And then ofcourse you have the mythos part, which is excelled. Something that Predators did, but not as well.
Just my opinions. Not flaming anyone for disagreeing.