Barrera - Morales for me, liked to watch both but was a bigger fan of Barrera. I think you have to choose a trilogy from you own lifetime, its the only way you can really get involoved with the hype. Ali and Frazier are more famous but I wasnt involved in that rivalry like I was with Barrera and Morales.
Although that is a historic rivalry, I cant add it to one of the best as one of the guys was so much superior to the other...
Well I said those just off the top of my head and honestly I felt that that trilogy was a littl overrated.The second fight was kinda boring and the third kinda overrated but it was good.Anyway it's up there with the best.