Marco Antonio Barrera is one who comes to mind for me. I always thought he was a great fighter but the McKinney fight really pissed me off. I thought he got away with a lot of low blows during that fight and because I was like 12 years old when that happened I couldn't stand him and rooted against him for a while. One of the happiest moments as being a boxing fan was when Poison crushed him but then Barrera slammed Hamed's head into the turnbuckle enroute to pulling off a great upset and I couldn't stop smiling.