I just left a startup that was doing pretty much the opposite of every point made on this list. After 4 months of 90+ hour weeks, I woke up one day and asked myself "Why the hell am I doing this?" Work environments like that are neither healthy nor sustainable, but unfortunately I think a lot of it stemmed from the mindset that there's nobility in killing yourself at work and anything less than that makes you a p*y. Needless to say, turnover was ridiculously high and morale was terrible.