The Aeons, man! Agreed
All the weapons - Disagree - half the time, whenever I tried to customise a weapon, it came out with some deadbeat ability I already had
The deep storyline - It was alright.
The awsome characters - Awesome? lolz. Yeah, like Auron was.
The Battle System - eeww. Sphere Grid sucked. Didn't mind swapping the characters though.
All the abilities - n/a
The scenery - Yeah I liked that
Sin - Sin was sweet
Chocobos! - no. They bugged me.
Mogols! - Unfamiliar with this term.

So I choose Sin, Scenery, Aeons..and storyline, though it wasn't my favourite. Kept my interest however.