I've done this drawing a few times and each time it gets better. The first was done way back in 2004 0r 2005....while enduring the misery of B&N and was lost in the fires of 2007. Can't say I'm going to miss it.
The sketch at the top was done while being a lazy intern at Nickelodeon, in-between donut raids on the production's kitchen. It was far better thanks to the numerous hits in the head I got from various people at the studio and my teacher Sherrie Sinclair.
The bottom sketch is the new one.....done out frustration of the old one....and certain folks at Nick once again hitting me in the head. Between the two sketches is a little over a year of improvement in drawing.