I punched a man in the face
Did you punch him for being overbearing?
No, I punched him for intruding on my space
Just because someone is too close to you does not give you the right to punch him. You should have stepped back if you felt he was intruding on your space. There are tougher people than you who could seriously hurt you and you could pick a fight with the wrong person.
I don't care. I'm glad I punched him.
I am sorry that he intruded in your space but you shouldn't have punched him. You could get in trouble for assault if the law didn't feel it was necessary for you to do so.