Free time? I'm faculty member at a university. I run a large research lab, and have big dreams and goals with regard to what I want my lab to accomplish. There

Free time? I'm faculty member at a university. I run a large research lab, and have big dreams and goals with regard to what I want my lab to accomplish. There is always more to do, so I don't really have any "free time." I have found that it is necessary to make time to relax or I'll get severely burnt out. For example, I'll typically stop working 2-4 hours before bed, and I'll occasionally take a weekend off, especially after deadlines. When I take time off, I spend it with my wife if she is around (two-body problem), I watch shows/movies, cook, and play PC games. I also go to the gym for about 5 hours per week, which I enjoy and find useful for both mental and physical health. To flip the question around, "If or when I have kids, how am I going to still preserve my career ambitions and maintain my productivity as well as maintain a happy family?" This question has been on my mind a lot lately. Some of my friends with children and who are academics report feeling guilty a lot: Neglecting their career, neglecting their graduate students, neglecting their families, and neglecting their children. There are only so many hours in the day. People tell me that you become more efficient once you have children and/or that you just sleep even less. I've heard others kind of criticize others' success in academia as being due to "not having children," and anecdotally it does seem like many of the most successful academics don't have children, have them after they have already achieved significant success and built a strong reputation, or have stay-at-home spouses.