And the winner is.....
Black pepper #1
The sriracha didn't add nearly as much kick as I had hoped it would. Will adjust next time, maybe add in some jolokia powder to make things pop.
The 4 recipes I mentioned in the first post are represented here from left to right. Obviously the darker colors in the right two are coming from the brown sugar. I realized last night that I did not add in the sesame seed oil that Cougar78 called for in the original recipes I was following. I'll have to make the teriyaki version again with that added in. It's a shame, I really like the flavor of sesame oil, very strong stuff but great flavor in moderation.