Ya know JT, I went through that about three years ago. I was just not happy with the vast majority of my collection and didn't like much of anything coming out. So I boxed it all up and sold about 90 percent of it on E-bay.
About six months later, I decided to start again, but now I collect only loose figures, and only ones I want, AND only ones related to specific topics.
I found that the short break, combined with re-starting with more of a focus helped me to enjoy it again (even more so than I had in the past) and actualy made it a little more challanging.
Sometimes a break dosn't hurt.
. . . and it's a lot easyer to stand them back up when my wife bumps into the book case.