I also like 7 because of the way it zooms in from the whole of Midgar to the station... it fit almost seemlessly into the start of the action (I didn't see it at first, but there are slight changes in colours and things, I recall...) and I'd never actually seen that kind of effect done so well on a game before. Plus the music, from the very open notes with the stars, to... I think when you actually blow the reactor up... I go back and blow the reactor up time after time just for that whole section of soundtrack...

Just felt I should add that...