I did, for a year or so after a bad fall. I hated horses at the time and was terrified. But about 2 weeks of lovely lie-ins and do what I want evenings I was missing it like crazy. I have friends who thought the same.
I think that if you do horses, you'll always do horses - whether you give it up for a bit or don't.
Sell & take the money. What's the point if you don't absolutely love it? I ride to compete and although I have a mother daughter share I don't think I'll get another eventer until I'm financially stable. There are other things to enjoy in life - especially in your twenties!
I ended up giving horses around age 20ish I think? My life just wouldn't fit around caring for them every day, and although I had been OBSESSED with everything horse from the age of 6 I'd given up any idea of horses being my career. I moved on and completely severed myself from the horsey world. Eight years went by before I got a major itch back! I started out sharing a horse and later became said horse's owner. I'm now 31yo and finally got my dream job late last year, but I'm struggling to balance work life, home life, and horse life all over again.
When I was an undergrad I spent a summer as a working student at a dressage barn. Man, did I get sick of horses. I didn't even want to look at my own horse or any horse on my days off.
When uni started again (non-equine related degree), my horse and I moved back to the campus and I resumed life as a one horse owner. My enthusiasm quickly returned and if I learned anything from that summer, it's that working as a groom in the horse industry isn't for me if I want to enjoy my own time with the creatures.