Kinda feel like everything's been covered, but thought I'd contribute anway.
For me I quit climbing entirely twice. The first time was living in Boulder, immersed in a very unhealthy relationship that I didn't have the courage/ability to get out of. When I'd climb, I'd get incredibly sketched, and I took it as the Gods telling me to focus on my personal stuff, so that's what I did. That was a 2+ year hiatus.
Pretty much the second that relationship was over I started climbing again.
Then I got married to a great woman. The second time I stopped climbing was when she left. She was the ONLY person I trusted climbing with, so when that ended, so ended my climbing. That was a 1+ year break. I still have a hard time trusting people.
Then there's always the constant struggle bubbling under the surface of hurting my hands, which would affect my guitar playing. That is hard to deal with sometimes, that conflict. As much as I wouldn't want to inhabit a world where I never knew climbing, if my ability to play music was somehow taken from me, that would hurt just as much, if not more.