I'm in america... have some stuff that I want to do besides physics and math in my adult life. Some of them require a lot of free time - like forming a one man band (with diff electronic devices and real instruments). How much time would I (haven't decided whether to go theoretical or experimental) have for such leisure activities? Doesn't a physics student/physicist from graduate level on have to do research and publish papers and compete for grants all the time, even in summers and weekends, and if you want to take sabbaticals you can only do so for academic reasons. Alternatively I could just kick *** at research and get tenure or something, but it'd be way too competiitve... I would just work part time, but I have doubts.