Character Portrait using Blender internal and GIMP
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I don`t like your rendered hair and the eyes look very bad…He looks scared.
Try to fix those and it will look a lot better. The cloth and the skin has potential though. 
Dr. House aged 20 years later or when he is still on the lamb. Well done.
Nice model! I like the details on the skin and forehead - And great job with the cloth… As mentioned in earlyer reply the eyes seem a bit uncanny though 