Aeris, for sure. I have always been drawn to her, and what peeks they have given to her background and thoughts have never been enough for me. More, I want more!

I also really liked Zack when playing the game (and before any spin-offs were made). I always thought of him as a really good guy who wanted to do some good in the world, and he took care of Cloud when Cloud should have been by all means dead.

I love all the FFVII characters, but those two have always been it for me.