I would say 140. I like them not too small and not too big. I love speed and quickness, but they also have to have some pop. I say 140 if not 147! Back in the days there was a point where HeavyWeight had the star players. At other times it was 150-60s. At the moment it's 147.
what does big and small have to do with skill? some of the greatest mexicano warriors fight at the smaller weights. we dont get a shot at being the greatest? chinga tu madre, puta.
The questions is, what weight class would you want the greatest fighters in? Different weight classes have different style fighters. Heavyweights won't have the speed, agiliy, and quickness that these lighter guys will have. Nor will these lighter guys have that "thump" that heavyweight punches have. Even though my favorite era was actually the Mike Tyson era, I actually prefer lower weights. They have a different style of fighting, if you know what I mean.