i have never been punched in the face during a street fight
Are the fights organized or just random?
Random, my first was against some one that was a trained boxer when i was about 14
This such an interesting hobby, are you angry when the street fight happens, or is it just for fun?
No i have not had one street fight that i was angry
Do you know your opponents or are they random people?
they all have been people that i knew 
Is there a clear winner of the fight, or a referee?
No referee but i have not had a street fight in a long time, if i was to have a street fight now i would be a formidable force, if i trained boxing or MMA when i was younger im sure i would have been champion