Terminator was better than T2. T2 is a mass market big budget SFX movie. The original is how all Terminator films should be. Dark, gritty, violent.
And Alien is a masterpeice compared to Aliens. Aliens tries to tick all the boxes...cute kid, romance, loads of action, happy ending. Bollox!
Only the Godfather comes to mind. And maybe The Empire Strikes Back. I also prefered Kill Bill 2.