Can't really think of a worst job, although maintenance on sewage pumps would come pretty close. Had a dozen or so differrent ones over my working time, enjoyed them all in one way or another. Best would probably be the 10 years I spent as a lighthouse mechanic. Paid to go where tourists spent heaps to get too, got fed and accomodated by the company, and had enough left of the (tax free) living away allowances when I got home to pay the bills.
Bill