Let's take a look!
|Left: 2007 Right:2009|
|Left: 2010 Right: 2013|
2009: Better. There's a definite anatomy to speak of, and the artwork "flows" better.
2010: Marked improvement, but takes heavy inspiration from the Superman Returns poster. Not sure, but tracing may have been involved.
2013: Definitely an improvement in anatomy, flow, highlighting, and hair artwork.
Anyway, I thought it was interesting to actually be able to see improvement in my artwork on the same subject over a period of time. Kind of opened my eyes. I wonder if a few years down the road I'll upload another Sentry sketch? Well, we'll burn that bridge when we get to it.