Is it normal to "enjoy" fist fighting or brawling?

Well to start off I am 100% Irish lol. But seriously, in High School I was always involved in fights(especially with Blacks and Hispanics) remember I'm from The Bronx and its not racism the Irish, Italians and immigrant Albanians are just different from other White neighborhoods in America(where we live isn't like a "white" neighborhood lol), See "Bronx Tale" to see how Little Italy is lol.. so now that I cleared that up and nobody calls me a bigot, what could be the reason behind me enjoying to fight, my uncle was a boxer and used to train me when I was young. But its like this when somebody starts getting up in my face, and threatening me, my mind kind of goes into an "animal" like state, and I can lose control easily, punching nonstop and basically bugging out, that is why I am concerned about this, I am a pretty big dude (6'0 - 190) and I goto the gym daily so I have a very muscular build. I don't want to end up in jail or something... What could I do about this?