Nice works here! I like your pencil sketches the most But everything is good!
I think that on your females (well maybe just the last two), you tend to make the space between the nipples and the navel a bit too much (should be approximately one head, ofcourse this differs with such foreshortening as on your last one).
On your last digital I think that shortening the nipple-navel space, making the hips a bit wider and the arm a bit larger will fix most of the proportion issues.
Post your lifedrawings and sketches from Hellmouth!! ^^