I'm really enjoying @Sketch_Dailies on twitter! It really keeps you on your toes as an artist! I'm in awe of the work I'm seeing there, and astonished at how quickly some of it gets posted, sometimes only a few hours or less after the theme for the day has been revealed! The skill and speed of some of the artists is unbelievable.
An easy way to see what I mean is to visit the official site: www.sketchdailies.com. This is my interpretation of the theme, "Lady of the Lake". It's an homage to "Deliverance" and "Excalibur", both directed by John Boorman. I tried to give the "Ned Beatty" character an anxious and...uh...vulnerable look.