If your job is to sit in a dark closet & stare at a wall, is that job a waste of your life if you LOVE it? It's up to you to decide. Personally, I would hate being a mail carrier for many reasons, one of which would be thinking of myself as a 90% junk mail flinger. I love writing code, and I spend almost no time questioning the value of reimplementing a certain type of feature for the bajillionth time if that is what the job requires.