VI will always be my favorite, the number of characters in that, that OST, story line, and of course Kefka
X is possibly my second favorite. I know many knock the voice acting but who really gives a damn, the story in that game is one of the greatest IMO. Once again the OST just flows with everything and who doesn't like "To Zanarkand"
IX is tied for my 3rd fav with VII. Zidane is that dude man. I don't think the story was the greatest but the gameplay, variety of characters and music was enough for me. I really liked Kuja as well.
VII has a dark moody vibe unlike any other FF game IMO. Some knock Cloud as being emo, cry baby etc. He's alright in my book. That battle theme, materia, characters, and that motorcycle chase scene and of course Sephiroth
Currently playing through VIII. Although not my favorite, I can appreciate the different approach to the way you battle, definitely requires strategy IMO. I also like figuring out different junction/magic combos. The GFs are pretty bad asss too. Squall might be one of my favorite FF characters, just wants to be left alone and minds his own business. Although Im sure Rinoa changes that towards the end
Regretfully never finished XII, my PS2 died on me. Im really hoping for a HD version. Ill take it before FF XV. I enjoyed the story and the enviorments. Took awhile but enjoyed the battles, especially grinding levels. Only thing missing for me was Nobuo Uematsu
I wont bore you guys with the rest of my life stories regarding FF but for the record I enjoyed XIII, and XIII-2 as well