Question for you sports betting experts

[Bigwig]

I used to bet sports quite frequently. Now, not so much. I do love picking winners for the hell of it, however, and have been keeping track of my numbers for a couple of years while occasionally placing an actual bet.

Anyway, had I bet all my solid picks, I'dve turned a decent profit over the last two years. I've got excellent numbers for picking basketball (college and pro) on the money line, and football on the point spread. Over/under on football--not so good. [img]/images/graemlins/tongue.gif[/img]

In the 1-table SNG forum we constantly talk sample size for results. My question: What do you think is a large enough sample size to be strongly confident for sports results? Say, 90%?

Thanks in advance.