He was a great yet unspectacular boxer that played point game and constantly put on boring fights.
Also he is a complete selfish douche that cares only about himself and his riches, in that order. I'm glad he retired. He was good enough to go 49-0 sure; but now others will get the chance to shine and hopefully make boxing interesting again.
UFC long surpassed boxing but as a MMA fan I hope boxing becomes relevant again.