I don't normally watch these things, and if I do, I'm only partially paying attention. But this one really held my interest, and I think it's worth seeing.
Mike Rowe of Dirty Jobs talks about the nature of hard, dirty, necessary work:
http://www.ted.com/talks/mike_rowe_celebrates_dirty_jobs.html It's 20 minutes, which I never thought I'd sit through, but it goes fast. Really good thoughts.