Big Bang Theory Portraits - Sheldon

My family enjoys watching 'The Big Bang Theory' on TV and now I do too. Since I have been getting into the show recently, I decided to draw portraits of each of the main Big Bang Theory characters, (yes, I will include Bernadette and Amy as well) starting with Dr. Sheldon Cooper. Sheldon is pretty much my favorite Big Bang Theory character because he's very entertaining and he cracks me up.
Hope you enjoy!