I'm pretty sure the only reason I finished FFIX was because I lent the CDs to my neighbor as I was playing, so while I was at CD 2 I lent him CD1 and so forth. If it wasn't for it I don't think I would have ever finish it. So little about it to keep me interested.
But considering another games, there are a lot I take lots of time to complete, a bunch of games with saves until the middle of the game.