Excuse me while I geek all over the place.
Even though I was born about 20 years after the original series of Star Trek ended, I like to say that I grew up with the show. My Dad protests, "no you didn't, I did!" But he's the one who introduced me to the show when I was little, so he should know better. Dr. McCoy is one of my favorite characters on Star Trek, and he has a great face with lots of unique features. When I was searching through Google for a good photo of him, I found that some other people had drawn him in pencil as well. Notice that, despite their different styles and skill levels, they all drew in McCoy's distinctive uneven eyebrows.
So here is my initial sketch. I'm excited about working on this.
And this is truly awesome, though if you haven't seen the show you might not get it: