Empirically, people who succeed on a grand scale work their asses off because they love (or are addicted) to their work.
So no, you won't be as productive if you aren't addicted to your work, don't love it, and/or don't think about it all/most of the time. (aside: yes, you need to eat well and exercise and take a breather from time to time).
Could you point me to that research?
Coz every time I've measured hours worked against productivity (with a few different dev teams now) insane hours do not correspond to more productive work.
Just coz people do it doesn't mean that they're more productive doing it.
So no, you won't be as productive if you aren't addicted to your work, don't love it, and/or don't think about it all/most of the time. (aside: yes, you need to eat well and exercise and take a breather from time to time).
Could you point me to that research?
Coz every time I've measured hours worked against productivity (with a few different dev teams now) insane hours do not correspond to more productive work.
Just coz people do it doesn't mean that they're more productive doing it.