Honestly the hardest part of the job isn't the flying but keeping track of all the receipts (gas, oil changes, maintenance, hotel, car rental, fed-ex, charts and any expenses when you are on the road), trouble shooting the equipment, in air restarts of the system, saving partial missions in a new set of drives, keeping track of the drives, coordinating with ATC to fly in different airspaces...
Coordinating with ATC is a must. Just yesterday I had to fly some FP's (flight plans or missions) right above four very busy airports in SOCAL. In two FP's I was flying in and out of the class B of the Miramar Marine Base and parts of it took me right into the final approach path for F-18's, C17's, C130's...and just 3 miles south of Miramar you have Montgomery field a busy GA airport. So at times I had to talk two towers at the same time.
After 5 hours in between F18's and Cessnas I went to San Diego Intl. The FP here had me at 2500 flying E-W lines beginning at 4 miles west of the SAN all the way to 4 miles east of the airport and a total of 26 lines to be flown. Some just to the north, some just to the south of the rny and some right above it. So I would be holding at the MZB VOR and the twr from time to time would give me a 5 minutes window to fly the line at the departure end. Eventually ATC gave all the Airliners a 2000 feet altitude restriction after take off. So there I was flying the lines and watching Airliners climbing right towards me but then leveling off 500 feet below. It was a bit scary but really nice!

And the south end of this SAN FP had me in N. Islands Airspace, right above their tower.
Anyway before I even take off yesterday I had to coordinate with SOCAL app, SAN twr, Miramar twr, Montgomery twr and N Island twr. That includes calling all the tower chiefs and explaining to them what you are gonna be doing at what time and faxing them a copy of your Fps is always a great idea. Usually you won't have to coordinate with that many people, yesterday was out of the ordinary. But you'll have to coordinate when flying restricted airspaces, class Bravo and sometimes even class Charlie.
As far as flight training goes you'll only train to fly the "light bar" and intercept the next line after you are finished with the previous one. The light bar is a piece of equipment taken out of F16's installed in the dashboard coupled with a GPS and a computer sys with a bunch of numbers that gives you all the info you need to fly the line and once you understand that you are pretty much good to go.
I hope that gives you guys more or less an idea of what the job is like. I really love it! And it's gonna make you a sharper pilot. Just think about it...the lines are like a localizer that never ends. Sometimes you'll fly a 500-800nm loc. needle.