First time critique- gesture and expressions

Hello!

Was just hoping for some critique on some of my practice sketches I did to help me find areas to improve on!

http://krem-de-le-creme.deviantart.com/art/Gesture-practice-590252473
http://krem-de-le-creme.deviantart.com/art/Sera-Doodle-590253102
http://krem-de-le-creme.deviantart.com/art/Faces-590252697
http://krem-de-le-creme.deviantart.com/art/Harley-Cape-590252849

Feel free to look through my gallery as well!

Hi FemmeFATAL1TY!

Those are some stunning drawings, very good work!! I'm not sure how to critique on them; most of them look like pretty refined sketches already. :) Do you work off photograph references or do you draw from the imagination when you make these?

Thank you! I worked off of photo ref for these sketches. Most of my work is done from imagination, but my practice always uses a model or photo!

http://drawpj.com/drawpj-members/wp-content/uploads/bpfb/567_0-04786800-1462250918_pose-practice.png

here are some poses I did I know they look god awful but do please comment and lead me to a way to further refine and improve my figure drawing.

http://drawpj.com/drawpj-members/wp-content/uploads/bpfb/567_0-04786800-1462250918_pose-practice.png

here are some of my horrible gesture drawings ranging from 30 seconds to 11 minutes please let me know how I can improve.