Football and tennis. In tennis, I like to predict tournament winners. Recently, I correctly predicted the winners of Wimbledon and made some money. I also like to bet on the results of presidential and parliamentary elections, etc.
Like to bet on more than x goals in a football match, its fun to see peoples faces when your cheering one team on the attack and a few minutes later your cheering the other team on the attack they can not understand which team you want to win.
If your team is playing you still cheer them on and want them to win but if the other team score it help your bet.