One requirement for this type of work that can easily be overlooked is a genuine enjoyment of your fellow man. After all, guiding is very much a people game. Your clients want to enjoy themselves in the outdoors, and a good part of that enjoyment should come from your guide. Pleasant, professional, personality, positive outlook, and ability to lighten potentially dull or disappointing moments with the right words.
My goal is to make your hunt the best experience you will have.