One of my cousins (RIP) was a sewer diver...he loved it and made a good living. He was maybe 5'7" and weighed 140 soaking wet, so he was the obvious choice on the crew when the pipe diameters were smaller. Not for me.
After a long hard day in my day gig (IT support), the thought of being a sewer diver sometimes sounds kind of appealing. I could be number one in the number two business!