Aww I loved 12 actually, I think it's probably my joint favourite with 10. That may have something to do with those being the first two I played though. They were both very different, I guess 12 isn't quite as character focused and Vaan was a terrible character. I'm not an old school final fantasy fan though, I much prefer the 3d ones over the 2d ones (although I still haven't gotten around the playing VI) as I can't stand grinding and random battles unless the battle system is actually varied (I know there's still some of that in most of the them but it seemed toned down to me). I really enjoyed the battle system in 12 though, although I did struggle at some of the bosses as I only trained 3/6 of the characters. To be honest I don't think any of them are overrated really, I really enjoyed VII and when I finished it I said "That's my favourite FF ever!" but I change my mind a lot.