i have this problem with Final Fantasy.
I start it then don't finish it. The only one I've finished is Dirge of Cerburus, and thats not even like the other ones. Currently though I'm in the middle of, 4, 7, 8, 10, 10-2, and 12.
I'm drawing near the end of 8, 10-2, and 12 though, so we'll see how it goes! >:O