Would I look horrible?
sticking out in the back is normal, its better than being totally flat IMHO. don't worry about the shape, theres basically no such thing as a truly "bad" head shape.
Probably somewhat better than a guy like you with mpb, and all the balding look that is involved with--accept it, you're going to be bald--control it or live with a horseshoe or bozo ring--it's really just that simple.
So, I'm not ready to go full on sly, but soon I'll be buzzing it close. When I was 18 I shaved my head with no guard and don't remember my head looking too bad from straight on. However, someone mentioned a few years back that I have "kobe" head. Apparently My skull is large towards the back...is this a bad thing??? I'm also not tall. 5' 7" and skinny... 125. Would I look horrible?