For me, Cricket is the best sports to gambling. I have enough knowledge on this game. And I know all team performance and players information, so I can easily guess this game result. Except this, i will do Tennis match betting and football game is betting. In these two games, i will follow some experts prediction, and I will place my bet.
cricket is not too good in my opinion, i like football more because it is actually easier to win on it
actually its depends on the person knowledge, maybe he is good in cricket and you are good in football, so the easiest sport to gamble is the one that you keep on updating, for me personally i prefer tennis or badminton because i like to watched the games, so the winner is a bit predictable for me