I'm not an expert when it comes to gesture drawing so I can't give much of a critique. But the first and third image are my favorite, I think it is becuase of the strong straights vs curves that you are playing with. Michael Parker's new course has a good section on gesture drawing (along with +400 non-nude images to draw from) and we have a course dedicated to gesture drawing coming next month! Brooklyn Walker, a character designer at Sony animation is teaching that course.

Thanks for sharing this! I think I'll go try it too