Terminator 1. T2 was great, but was the beginning of the end of the gritty, action movie. I HATE CGI, give me puppets, real stuntmen, real car crashes, and poor effects any day of the week. Movies like Predator, the Mad Max series, Blade Runner, Death Wish, and others were just so great.
Arnold is just too great as a bad guy. T2 was, IMO, way too slick. Let's not go to T3.