Good: - Basketball - Benchball... I wish it were an Olympic sport - Rounders - Most teamsports with 'ball' at the end, well I prefer them e.g. Netball, volleyball etc.
Bad: - Cross country... eww - Hockey because you have to hurt your back trying to whack the stupid ball (although I have improved this year!) - Football - Dance
Bad at sports that use the feet. What a stupid idea that is.
Also I suspect most of us are good at the sports we played growing up and not at the ones we didn't. I once tried to play basketball with some americans, that was embarassing.