I'm going to come out and say it: Loving what you do (for work) is a luxury. But even if you're a statistics enthusiast or a strategy geek, chances are you don't want to spend all your time working. That's where having a work/life balance comes in. The concept, to many, is pretty novel. It's long been fashionable to spend long hours working in the office or from home, putting in the extra time because your bosses, for some reason, expect you to be available around the clock. There's a reason th…