Although the 2009 Hulk is one of my most popular deviations (certainly on dA), it's too random. The lines go nowhere and the shapes are haphazard. These days, I like to have as many of my lines as possible converge in one spot, or be perfectly in line with another part of the image. You could put a ruler against some of the lines in the 2012 version and things would line up.
I like to think it's improvement, but I guess it could be OCD!
The original: [link]
The new version: [link]