The backstory behind them are great.
My favorites is 3 and 6 (top to right, then next row) They bring out the more "wise" yet evil look to them without looking too evil. They also feel more uncannily human but not.
I'd probably work the posture and body proportions a lot more. In general though, I can't help but think of the Kimoneans in the Star Wars - the Clone Wars.
Thanks @ trinumedia! Yea, really just starting on the overall body proportions. Still brainstorming that. The first ideas I push out are always generic things I've seen before(like the Kimoneans, haha) I find it helps me to just go ahead and draw them even though I know I won't pick them in the end, it's like my brain needs to get it out to put it behind me. Thanks for the feedback!
Hah!
I knew there was a smack of Kimoneans there. And yes, good exercise on the tracing of ideas to first understand how to do it before you do your variations. Looking forward to future updates of these guys - and more the story!