Introduction: I would say it mainly comes down to experience and effort:
Flying aerial photography flights can be challenging, you have to try to get the photographer in the right position at the right time while keeping the aircraft as steady as possible and managing radio communications, Air Traffic Control clearances, watching out for other air traffic and keeping tight control of the aircraft itself.
I have 2400+ flight hours with countless aerial photography and videography flights under my belt. This is especially important when operating in the NYC area where you have the additional challenge of very complex and incredibly busy airspace. So you definitely want someone with plenty of flight experience who knows the area very well and feels confident operating in it.
Another point that sets me apart is that I take the time to carefully plan each flight. I find and plot the coordinates of each location in my gps ahead of time and figure out the quickest route, what hazards/obstacles might be in the area, whether any special coordination with ATC will be required, and check that the weather will be suitable. This planning makes each flight run smoothly, efficiently, and gets the results that are required, saving my clients money in the process.
Well obviously getting to fly helicopters is a tremendous gift and privilege. I get to see the world from perspectives only very few people on earth do. It also appeals greatly to my love of science and engineering.
There is probably nothing that can make you feel as free as flying a helicopter.
My favorite flights are when I have the opportunity to fly somewhere I haven't been before, preferably on a beautiful summer day with the doors off!