For me it's 6, 8 and 9. I've got 7, not bothered to finish it, because, well, it's a long story. I had the PC version, and just before the Chocobo Race, the game screwed up (for...reasons). So, I decided to buy the PS version off my friend, and I wasn't bothered to play through the same levels again, so yeah.
No Aerith dying goodness for me.