FF4: It's my favorite too of the 2D FFs. I'm going to chalk up most of it due to it being my first FF ever, and there's just some amount of nostalgia that's always going to keep it close to my heart. But, yeah, I do think it drags a bit and I think it's mostly to do with Cecil. I mean he completes the entirety of his character arc the second he becomes a paladin and that's at like what? Just before the halfway point? Tellah and Yang's sacrifices help keep the pace... but... eh.
FF6: Definitely. Kefka was the most solid antagonist. And he won.
FF7: Jenovah's weird. Jenovah is basically John Carpenter's The Thing, and that's cool. The devastation it wrought was cool. You just never get to really deal with it though because Sephiroth is basically controlling it the entire game.
Yeah, I agree it could've been written out or just stuck in the lore around the game and left it at that.
I just don't think Sephiroth had to turn into a monster. I thought his appearance in Cloud's mind/soul at that omnislash scene was far more powerful.
FF8: It's still a FF so that's got to count for something.
FF9: It's definitely worth playing.
FF10: Yeah, there was enough room for Yu Yevon. I just don't think a whole separate fight where you can't die and have to cycle through the other aeons were necessary. It's padding the climax for no reason.