For my art classes, I've just done some self-portraits. For reference, here's a photo of me (thanks, beaglebot!
My first attempt was to be as close to realistic as I could. I did a 3/4 view using my wife's makeup mirror. That's why I appear to be looking to my right.
After that, I started playing around. Here's more of a gestural sketch, full-on.
After that, I realized that my puffy face has very little interest when there's no expression, so I did one smiling. See the dimples?
After that, I started working on more abstraction. First I flipped the mirror over to the magnifying side and positioned it where I got a double view of my face. I tried to draw that.
Finally, I did a contour drawing. One continuous line, looking at the paper as little as possible. I turned it into a yo-yo string.
Hope you all enjoyed that. Thanks for looking!