Yep I know just what you mean.
1990 I sold off almost all my gear, half a PA and guitars, whatnot, only kept one mic, a small mixer and an acoustic. After less than a year I had joined a band as a singer again, bought another electric...then I was in about five bands, singer/guitarist, singer or bassist/guitarist until...
1998 quit all of my bands at once; sold off my amps and most of my gear, only basically kept my Les Paul and some odd pieces of gear. That time it took a little over a year to again start as a singer, develop into singer/guitarist AGAIN and so on. We were just about to land a record deal too when I quit.
Then in 2004 I quit again, again sold off the PA system I had collected again and most of my gear otherwise...but kept a couple of guitars and a bass. Quit all my then current bands too. One of them was getting a bit too popular anyway, so it was time to quit it before it would have ended up in a record deal or actually getting income from it.
2006 I started being more active, Internet bands etc...finally sold my Les Paul off as well as all my other guitars, and built/had built 3 electrics to my liking plus bought an acoustic again...ended up in a handful of bands once more.
2009 finds me quitting most of my bands for now, but this time not all, and I'm concentrating in one live band and one Internet project, doing other stuff only intermittenly...but more like amassing more gear than reducing
It comes and goes...I seem to always quit when the band is actually starting to get somewhere.
It's a dilemma; I would love to have my music listened to by millions but I'd like to do it basically incognito...