I have Super Robot Taisen: Original Generation, which has two paths depending on which protagonist you play as. I already finished it once with Ryusei, now I'm playing with Kyosuke, but once you reach the twentieth mission or so, the two paths join up and you're basically replaying the same game over again. I still have about 12 missions left but don't really feel like replaying the same game over again over from that point...and I still haven't started OG2 which is supposed to be better than OG1.
I'm also about 1/3 of the way through Wild Arms: Alter Code F, but the horrid translation is preventing me from enjoying the game to its fullest. I want to finish it before I start WA4, since it uses the save from ACF.
And I'm more than halfway through Tales of the Abyss, but the horrible loading and terrible frame rate in the world map is seriously diminishing my enjoyment of what would otherwise be a very good game (they should have just released it for Gamecube, it is SUCH a shoddy port).
I need to bite the bullet and finish one of these games before I can move on to something else - which shall it be?