I'm going to handicap my list to only fighters who had careers during my lifetime...

1. RJJ - other worldly talent, like he was from a different planet, always amazed me (until the 2nd Tarver fight)

2. 'Iron' Mike Tyson - You knew there would be drama but you didn't know what to expect. Would he kill someone? Would he implode in the ring? You never knew but it was going to be exciting. Although post prison the skill level just plain wasn't there...still exciting, but not as skillful

3. Arturo 'Thunder' Gatti - The guy was never in a bad fight. Just a straight blood and guts warrior, but he could stick and move at times which made him very interesting to watch because as a fan you waited for the moment when he squared up and fought face first which would either win or lose him the fight.

4. Miguel Cotto - Like Gatti, just a warrior. He would keep that poker face no matter what was going on in the ring, and he had raw power. It was very intriguing to see him when he chose to box though, because he is very skilled at it and it's not something a lot of people give him credit for.

5. Going to cheat a bit: The trio of De la Hoya/Mosley/Trinidad: Consummate professionals always brought their A games, and there isn't much to separate them talent-wise .


Runners up/Honorable mentions
I personally enjoy watching Wlad & Vitali fight, but in terms of excitement there's precious little drama in their fights (by design) as they typically win by stoppage and they are methodical in the way they fight. That said, the technical skill that they show is and always has been underrated.

Also Diego 'Chico' Corrales, Erik Morales, Manny Pacquiao, Naseem Hamed (he was a little shit but fun to watch), Tommy Morrison, Lennox Lewis, Joe Mesi.