This isn't my favorite Final Fantasy but I love the story in it how the Cloud tries to save Aerith from dying and you can feel his pain when he stabs her with his sword after Sephiroth controls him. And I think every guy was staring at Tifa during it's release.
Gripping storyline, amazing graphics for it's time. Very interesting battle system, and every character, even the optional ones (Yuffie, Vincent), develop as characters very well. Cons: Some real fluffy times, but what sort of RPG wouldn't have that?
My personal favorite in the Final Fantasy series. Very entertaining plot, and one of the best villains in any video game (Sephiroth). Materia system is surprisingly complex. Cons: A bit dated at this point. By the end, the plot can be a little confusing.