If I had to choose any movie sequel, it would definitely be "Resident Evil: Apocalypse." The Resident Evil series has always been my favorite, and although the first Resident Evil movie was totally awesome, the second one just blew me away. It was the first time I'd ever watched a movie where you were in a city during a zombie break-out, and the inclusion of things such as the Nemesis and the completely stylish Jill Valentine made it even better. I guess what I really loved about it was that, even though they managed to maintain the horror element of the first film, they didn't lose themselves to action like they have ever since. The movie was scary, action-packed, and very much sci-fi, but the plot was decent and you cared for the characters while they destroyed everyone around them and fought for their lives.
Oh yeah, and the fact Alice was a complete and total beast helped, too. The ending was probably my favorite out of any movie ever. (: Hahah.