I'd contend if you don't keep up some semblance of a life (hobbies, friends, etc) while doing any work, you're going to burn out. You can work * a lot * as lon

I'd contend if you don't keep up some semblance of a life (hobbies, friends, etc) while doing any work, you're going to burn out. You can work * a lot * as long as you keep your life together via social and personal development activities (as well as exercise, don't forget that one).