Which sports or matches are the easiest to wager on? I know different people like different sports but which one is most or easily profitable than others? Most people stick with what they know only, like me I prefer tennis, world cup football and basketball but which ones you should bet on since they are "easy"
The easiest* would be the one you preferred and have knowledge. There is no specific answer to the question because like you said, different people have different preferred sports. The knowledge of that person to the sports is his tool to make his future bets on that sports become "easy".
For me, I preferred basketball most and UFC, MMA and some boxing events.