I'm not big on replaying CRPGs, actually. Other genres I'm more inclined to, but that may just have to do with their being driven by gameplay, whereas CRPG gameplay tends to be... lacking. Given the painfully linear stories for the most part, there's little incentive. A failing of the genre in its current state, if anything.
Someday, I might replay PST, or KOTOR2. Those are the only two, I think. You couldn't pay me to replay the BG saga.