I agree with this. I ran a small software consulting group for four years. In that time the company was my sole-focus. I had no friends, no girlfriend, family was 1000 miles away, never went out. Just focused on that business. Within four years it grew beyond what I could imagine but everything else suffered and took almost two years to repair (reconnecting with friends, regret of letting relationships fail, reconnecting with family). The past year I took on many of my old hobbies. Working on cars and going to the gym suck up so much of my time now. But... my business and career has suffered now from how much time they've taken. What I am growing to realize is that there is a time for everything. Four years of my life I was meant to focus with my head down on my business. Just because my focus has changed, it doesn't mean that I am wrong for doing so. Have to let your mind take you places for a bit then analyze if you really enjoy where you're at.