Y'no, I can't think of any FF that I've really had a notable change of opinion on. But then, I can't think of many games I feel that way about, either. I don't replay games all that often, mind you, which could have something to do with it. I've replayed FFV, FFVI, FFVII, FFVIII, FFX (to some extent) and FFXII (and re-watched as Danielle played FFXIII and FFXIII-2). My opinion probably changed the most for FFXII, if only because I understood what was going on a bit better the second time around.