Very appealing designs!
I like both #101 #102 #106.
#102 - something about the downward PCB design and the repetitiveness doesn't sit well with me.
#106 - could I see this with the logo on the left please, and a lighter blue on the inside (the background colour for the PCB)
#101 - I like the design although the message I get when I look at it is "bionic electronics". Nice design none the less.