I'm getting a lot better at only keeping/buying games that I know I appreciate and enjoy playing. Many of the B and C tier games I have gotten rid of, and won't pick up again. Some are popular, some are not. I used to pick up games that were good deals, now I just pass on them as it isn't worth the effort.
Many of the Ballys/Gottlieb SSs are long gone. Have a few left, but only the ones I really like (Fathom, Frontier, etc).