So many great films, hard to choose. Went for ED2 as it was so much better than the first (but the third was better again). Technically, isn't Empire Strikes Back the fith film? ones not in the list: Back to the future (part 2), Desperado (El Mariachi 2), Rambo First Blood (part 2).
I believe I voted for LoTR TTT. But Its very hard. I would have to say that Terminator and Indiana Jones III (the one with sean connery) were the best. I thought the second Indiana Jones wasn't the greatest... But those are a good deal of great sequels!
I went with Terminator 2 because it's one of the few that have outdone the original.... I feel the same way about Austin Powers 2, but not as much!