Of the FFs you've actually beaten, which have you completed the fewest amount of times and why?

I'm tied for FFII, FFV and FFVI, each of which I have beaten once. For FFII I always seem to get about halfway through and then just stop, FFV something always happens to my save, and FFVI I admittedly didn't enjoy as for some reason it felt as though there was too much dungeon crawling... odd because I adore every other aspect of the game. Saying that, I've beaten Awful Fantasy III (Something Awful's hack of FFVI) countless times as I appreciated its humour and unusual difficulty tweaks.

Technically speaking, I've also beaten FFIV once; the PSX version and once on the SNES, which is an easier version anyway and I don't count it (not to be confused with Easytype, a different game again).

Same goes for FFIII; once on NES, once on DS, and then also once blatantly cheating with a team of FEOKs right from the beginning. NES version was because of it suddenly losing my attention, DS version because I only just got it :P