Character development - Boy

I like this one for the oversized head. It's based in part on the drawing I did of my friend Alan, who often wears these large hats and has very distinct features.

As a character, he'd be either like an energetic kid with cute, round geometric features or with relaxed, droopy features he could come across as a young punk/skater teen.

I feel the style with the slightly more realistic facial shape will offer more in the way of interesting shapes when it comes to creating facial expressions, perhaps even incorporating the ears as a feature in themselves.
I tried to use colour in a bit of a more interesting way to do away with the flatness before and even develop a bit of a style.  It still looks a little flat but the cartoony nature lends itself well enough to this as a feature.
I think this will definitely be the one I take further to completion.