I try to play Oblivion after modding it, but I can never get ctd problems to stop. Might try New Vegas, or go back to Morrowind after I beat Arktwend (tc), and then maybe try Nehrim for Oblivion. I still have Shin Megami Tensei: Nocturne to beat, but it does get hard to get back to a game after not playing for some time. Had this problem with Dragon Age too. I also have Odin Sphere to play, but not until I play through Nocturne. Also Knights in the Nightmare for ds.
maybe play the Witcher, if I can get into it.
Maybe this also, a few others, but mostly the ones I mentioned.