I find this question interesting because over the past year I've been reading everything I can find in the library about work, the history of work, pride of workmanship, craft, job satisfaction, motivation, and so on. There are two schools of thought (at least). On the one hand, some people strive to find a great job that's instrinsically stimulating and motivating. On the other hand, that can't be a universal human need: the world needs ditch diggers, too, right? So the other angle is that it's not what work you do, but why and how you're doing it that matters. Are you finding/creating challenges at work and growing in your skill? Are you using the excess money surplus for worthy causes, or are you squandering it on empty entertainment and vain pursuits?

I don't know which view is right, but the philosophy is fascinating.