The game is simply not that great. It's glitchy, slow, and the storyline kind of bores me. The fanbase is much worse though. I see no reason to call FFVII the best, and the main reason many base their opinion on it is because it has Sephiroth in it.

Note: Kuja was a much more evil guy, and therefore cooler. Following this logic, FFIX is one of my favorites. That, and I loved the storyline and the characters.