Awesome sketches. I hope you don't mind me saying this, but some of your female sketches here remind me fondly of Shunya Yamashita's work in ways. It just looks like you're able to create a certain attractiveness without the need to push the bar too far if you want to. As a whole, your technique and designs really are quite impressive.
Nothing like seeing a nice collection of sketches, and these are definitely fun to look at. Well done!