I have normally tried it on fifa and cricket only. These games are very exciting and at most times if you watch closely you can even predict what's the outcome going to be. However if you let your intuition let you guide you far away you can incur heavy looses also. From my personal experience, I can say I like to play on this two sports cause in cricket you can see the pitch condition, the team and their recent performance and you can get a fair idea. Football always select the best striker or the best defender team and you can make a lot of money. But there is no surety as such and I have learnt it the hard way. But it's all fun, since I am very careful not to gamble way to much.