I'm going against the grain here, but...
I can understand the hate for it, I can understand it's flaws, but to me Final Fantasy VIII will always be my favourite.
I love the futuristic setting, it's characters, and it's battle system. Which added a unique spin on the tried and tested battle system of old.
Also, it's incredible music, which includes some of the best final fantasy songs ever created. Which even the most critical of Final Fantasy fans can't honestly deny with a straight face.
I have played nearly every single final fantasy (yes even VI, and IX), and I still think this one tops them all. It just connects with me on a personal level like no other Final Fantasy game ever has.