Rugby, American football, and soccer are considered the three most aggressive professional sports in the world. This answer is more of an opinion than a fact.
soccer is the sports that has most pro leagues. It even has a World cup.
Soccer because it is played in almost every country in the world.
professional gaming and fapping are ahead
Mark van Bommel, Gennaro Gattuso and Joey Barton are probably the most aggressive.
According to Forbes.com, the most profitable sport in the world is American Football (College and Professional) respectively. The Dallas Cowboys are the most valuable franchise in the NFL with a net worth of about $1.4 Billion.
As of 2014, the professional sport that has the most female fans is NASCAR. NASCAR is a stock car racing series.
Professional Bicycling is the most watched sport in the world based on the number of people who watch it but I am unsure how many "games" or races occur within each year.