I actually mostly enjoy what I do for a living, though I do moan about work from time to time. I did see somebody yesterday with a far worse job than mine...
As I took my dog out yesterday lunchtime we bumped into a cheerful council chap whose role in life is to empty the dog-bins (if you don't know what they are, think about it). Not only did he seem perfectly contented, he even likes dogs, which given that job, I thought was rather impressive.