entry 16: not a big fan of the bubbles entries 14 & 15: i prefer non gradient version.
in general, entry 13 is the one from your entries I prefer. The stick figure is cool, but overall I feel the logo lacks to represent the sense of "sharing knowledge with community"
remember the Top Three Things to Communicate through my Logo: #1 - coaching #2 - sharing knowledge with community #3 - reaching new people (making money for coaches)