Cool, glad you liked the idea. So far the challenge sets are;

Skating based (usually will be a specific thing, like wall ride to this or manual to that, however the flips or grabs you choose to do are up to you)
Wacky based (Quirky things such as getting any trick off a particular prop, sometimes not even involving a skateboard)
Spot Based (5 tricks or lines at specific spots, trick choice is up to you)
"Editors Friend" based (Things to help me make a video, may be filming scenery or bails)
"The best" based (things like best transition trick, best rail trick)

Also, I have added to overall rules.

1) All clips considered useable, whether used or not will earn points
2) All clips that make the edit will earn points