Earlier quoted context omitted.
I wouldn't necessarily draw the line there. It always depends on your situation. If you don't have a family, working 7.30am-5.30pm (my approx working hours) 5 days per week still allows you to have enough time to spend with friends and for side projects. If your really dedicated to your project and have no family waiting at home, why should you always leave after 8 hours? Sitting in front of the TV at home isn't nece…
I hope you negotiated an appropriate salary for the extra 25% a week you're apparently working as opposed to the standard 40 hours a week. There are jobs with flexibility that don't require that amount of time.
I wouldn't trade my job against a better paying job with strict 40h/week if I don't like it as much. And I wouldn't want an employer where every working day is strictly 9-5, no matter what project you're on or how the workload is.