Working long hours continuously on something you don't like with people you despise will burn you out. Working on multi-year projects is especially bad. On the

Working long hours continuously on something you don't like with people you despise will burn you out. Working on multi-year projects is especially bad. On the other hand, working long hours for a few months on something you like with people you admire won't burn you out. I was raised on a farm where you worked hard at different things depending on the season, with slack periods between. This was much healthier than engineering.