Soldato
The Matrix 2-3
Especially 2. perfect balance of plot/action (unlike the 1st, which was all story for an hour, and then all action for an hour) but most slate it as a dissapointing sequel.
The third only fell down for not having enough martial arts action scenes. But in it's own right it's one of the best sci-fi movies to date.
The films were alright but nothing compared to the first. Part of the problem for me was that you couldn't relate to the relationship between Neo and Trinity - they were just attractive actors, it never covered why they were in love. I just think they went in completely the wrong direction.