Like Spider Man 2, I've never understood the appeal of Terminator 2. The kid that played John Connor was horrible; every scene he was in was ruined by his terrible acting. Turning the machine more 'human' was bad enough as a concept and even worse in practice. Suddenly, at the end, he's a soft, sympathetic father figure with a thumbs up sinking into the molten metal!
I've watched the series again fairly recently (although I haven't seen the new one yet). T1 is a classic. T2 is acceptable but extraordinarily overhyped. T3 was decent, Salvation was pretty bad.