FFVII. It's the best written one up until now, IMO. It's mjust so complex and keeps you wondering. it's also very realistic.
FFVIII's was nice as well, but more cliche, whereas VII's was more original. And yeah, it does sometimes happen the way it does in VIII. I say this based on my own experiences.
I liked X's as well but... Yuna seemed a bit passive here...