I dont have a favorite professional or amateur sport, per se, but I do favor watching professional Basketball the most.
My favorite amateur sport, is simply tweaking diet and training within my own personal science, and getting better, and improving my personal moves as I progress. Just as some amateur and professional athletes continually "practice" their profession, have a level of dedication to improve and maintain this practice in preparation, I pursue my dieting and training-sport in "like" fashion. Then when I get on the court (the mirror or personal objective), I am not all that surprised, I was able to perform.
Best wishes
Chillen