I like Havo, he is not leaning too much on the overt exaggeration we see in a lot of portraits that make them look all but natural, just trying too hard. What I like the most in characters portraits are usually when they just try to be natural, like a cool photo you could have taken of someone, not the "look at me i'm so awesome and dark and brooding with mah face in the shadows grrr".
Well anyway, I like Havo because under his eye patch and scars, he just looks normal with a cool attitude, almost friendly, but you don't really know that for sure. I thin it translates the character well.