Very nice - I really like the way you define the planes of the face in your portraits. Also, I tried your method of sketching in public and nobody came over to tell me I was creeping them out, so thanks!
Nice colors, nice brush strokes, nice edges, nicely captured characters - i like it!
Maybe this has been asked before, but do you use a medium to achieve smoothness?
Oh and great post on drawing in public - should be a sticky It's funny because as I was reading it I was agreeing with everything and I kinda was already using those principles but I haven't thought about them before. Like starting to draw something else or at least faking it when the subject starts showing interest in you. I do the same thing hehe. Little mind games