From Start to Fnish, when your in Midgar at the beginning, its just the greatest hour or two or gaming. Best part in FFVII, and best part in any game for that matter. If I was to pin point an exact moment, when Cloud awakes in Aeris flower bed and they are chased up onto the roof top of the church. When they are walking across the mounted rubbish, the music is just great, the back ground is outstanding ( the gigantic Pizza plate )
Gives me goose pimples just thinking about it.
*craves to play FFVII some more*