Ref #10 - good, clean, simple and easy to replicate in any medium. It's not too powerful - meaning it doesn't jump out and grab your attention and keep it. But, it is a start to get the name out there and make it easy to read and recognize.
Ref #8, 11, 12 - I thought about a G forming a sun, but think offset orientation doesn't look as good in this case - I think sunbursts would be better off being bigger and fewer - making it easier for replication and identification if that motif is one that a designer goes with. A few sun designs so far, so that's a general comment, but one that would apply to the 3 designs above.
I didn't like #7 - reminded me of a food label, which is good, but seemed like a pure word-art concept like we could (almost) do in Word. Not a critique of skill - just the feedback on that style for this particular event. thanks for submitting it though, because now I could give feedback on it to help steer to what I do prefer.
cheers