Wow you do quick modifications...i'm liking #10 the best right now...still have to rank but wanted to give you feedback... not sure I like the one dot as the head of both people...makes it less "dated"...perhaps shadow the "head" with gray behind it so it looks like to people leaning in to collaborate...? I'm still thinking this over...
I like the metallic look in #16, but the contrast seems less...is there any way to give it more sheen and have more contrast? Also, there is something I'm not sure I like with the "dot" ...I'm trying to put my finger on it...I will get back to you with more detail later tonight.