In some ways I actually liked the moving every few years aspect of renting. Every move made me really re-evaluate all the junk I had and if it was really worth it to hold on to. Do I really want to have to move this thing I didn't even really use to yet another place? I got to live in a lot of different places, have some different lifestyles, have some different roommates, and live a pretty different kind of life every now and then.
Living in the same place now for years makes it too easy to just hold on to junk, it makes it too easy to just fall into the same routine.
There's some pros and cons each way. It really depends on what you're wanting in life at the moment.
True, although I've also moved houses and turned everything over. Having lived at the current place for a while I find it's important to, every five years or so, turn everything over and re-evaluate it. Even if my domicile isn't changing I'm still changing as a person.