Hi Leland I'm from Gilbert, so a jam sounds really cool. Anyway, as far as judging riding goes, I would say creativity & flow are important. When you see the videos from Japan they're very individualized & creative. It's more fun to watch & harder to do than just being a clone. Also, flow/smoothness should count too. This shows mastery of tricks & combos. And if their socks don't match they should get extra points too!