Work/Life balance is very trendy topic at the moment.
“Most of the studies on the harmful effects of excessive work rely on subjective evaluations of work “overload.” They fail to disentangle respondents’ beliefs and emotions about work. If something bores you, it will surely seem tedious. When you hate your job, you will register any amount of work as excessive — it’s like forcing someone to eat a big plate of food they dislike, then asking if they had enough of it.”
Here’s an interesting article on it from the HBR Blog.