Self portrait, expressionless

[Anbesol]

I had an assignment for a class, to photograph a person "doing what they do", one of the three was to be a self portrait, so I got myself with a camera. Here are a couple of my favorites, I am not good at faking a smile, so I shot for a completely blank expression. How does the images work for you? Does the lack of expression empty the substance of the image? Any other critiques or ideas? I've also included a plain self portrait, as I think they work as a series considering how similar they all are. Thanks for your input!

*edit - and yes I am aware I need a hair cut. Please excuse the excessive amount of hair.