Hi.
about the entry #4, if you could find a way to make the icon smaller... The thing is, the legs are going quite at the bottom and on a mobile device, we won't be able to show the full logo because it is using a too tall icon.
Also, if you can make a version with the upper body only (without the legs), maybe it could be quite nice and be sharper.
What I like about your logo is that with only the upper-body of the icon, it could be used everywhere.. but could also refer to the all-long icon (with the legs). So I could have 2 different version of the same logo.
I like the alternative colors and the choice of colors you've done.
Were you trying to use the upper-body and legs to make appear the letters M C S ? If I am looking at it, I can find those letters, even if it is hard, I like that possibility.
About the entry #5 you've done... the triangle behind MCS doesn't mean nothing to me... I would have prefer an icon that would have something related to teams/sports, or organization/planning.
I am not sure if I want to keep so much emphasis on MCS... I guess I prefer a strong icon than the letters.