I'm going to buck the trend here, but I love my job.
I may feel a bit differently if I did my own work, but I'm a SE contractor and I do other people's work, and I enjoy everyday.
I had 9 weeks off last year (through choice) and still earnt 39k after expenses, I don't know where else I'd get that sort of money and be in the house by half four everyday and have weekends off.
I don't mind a problem customer to be honest, I find people like that a personal challenge if I'm honest, and ill always make sure I win
like I say, my outlook may be different if I did all my own work, but I've never done that, so I can't miss what I've never known