I am probably going to be drummed out of fandom for this, but this is an easy question for me, and the answer is Final Fantasy VII.
Maybe I came to it too late -- I didn't play it until 2004, by which time I had played the other PlayStation-era games as well as FFX and X-2. But I honestly don't think the early-generation graphics were the problem, although I'm sure it didn't help. I found the story confusing. Cloud was not particularly compelling as a lead character, nor Sephiroth as a villain. The mini-games didn't really hold my interest, and I was never able to figure out how to wake up Vincent. For whatever reason, the game didn't speak to me. I did finish it, and considering what a major piece of gaming history it represents, I'm glad I experienced it for myself. But I have no compulsion to revisit it, or to play any of the other games in the Compilation. (I might have made an exception for Crisis Core if I had a PSP, since Zack is one of the characters I actually do find interesting. But alas, I do not, or any particular plans to buy one.)
The other Final Fantasy game I didn't really care for was FFV, although I acknowledge it may not entirely be the game's fault; we played the PS1 port, and I understand that it's pretty wretched. If they ever do a DS remake on it, I might give it another whirl.
Day 03 – Your favourite Final Fantasy theme/song.
Day 04 – Your favourite Final Fantasy party from your favourite game.
Day 05 – Your favourite Final Fantasy City/Town.
Day 06 – Favourite part of your favourite Final Fantasy game.
Day 07 – Least favourite part of your favourite Final Fantasy game.
Day 08 – Favourite Chocobo Version.
Day 09 – Favourite Moogle Version.
Day 10 – Best Final Fantasy scene ever.
Day 11 – Final Fantasy game that disappointed you.
Day 12 – Final Fantasy game you’ve played more than 5 times.
Day 13 – Your favourite version of Cid.
Day 14 – Favourite Final Fantasy male character.
Day 15 – Favourite Final Fantasy female character.
Day 16 – Your favourite Final Fantasy limit break.
Day 17 – Favourite Final Fantasy mini game.
Day 18 – Favourite Final Fantasy opening sequence.
Day 19 – Best Final Fantasy outfit.
Day 20 – Best Final Fantasy hair.
Day 21 – Favourite Final Fantasy pairing/ship.
Day 22 – Favourite Final Fantasy summon.
Day 23 – Least Favourite Final Fantasy mini game.
Day 24 – Best Final Fantasy quote.
Day 25 – Final Fantasy game you plan on playing (old or new).
Day 26 – OMG WTF? Final Fantasy moment.
Day 27 – Best Final Fantasy storyline.
Day 28 – First Final Fantasy game obsession.
Day 29 – Current Final Fantasy game obsession.
Day 30 – Saddest Final Fantasy character death.
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