I think I am about to have a massive F.A.R.T. myself. Tired of having all this stuff around.
About six months ago I bought a black Pentax Spotmatic with pristine 28,50,135 lenses. I forgot I even had it until yesterday. I swear cameras are like rabbits. You look away, and all of a sudden they have multiplied.
I do the one lens thing all the time. I just put one lens on the camera and go. Keeps it simple. If you work with what you've got, you won't miss out.