I am starting to feel that way a little bit with AFMr. I played AFM more than any other game at PAGG for a couple of years, then played the remake last year, and had to have it. It is still fun, but I just don't play it much. I play GnR less at this point, but both get played less than 5 games per month right now. Not sure if I should sell or trade for something else, or just let them sit and maybe I will play them more in the future.
I think I would enjoy replacing them with Pirates and Hobbit, but I haven't played a ton of games on either of those. They were fun when I played them though.