I think you should look at his record.

Started at 22, declared that he would be a world champion by 30 and retire, duly did that with undisputed Cruiserweight and wba heavyweight, didn't retire, milked Warren etc. by smashing Macaroni, Harrison, Chisora etc, continuing to make good money, but injury caught up with him . Not a bad innings I'd say and one of our more successful boxers both in titles and financial acheivements. Remeniscent of Billy Walker in terms of fan appeal (but Billy never won a title), and not scratching around at the Albert Hall for Levine every month like Cooper/Bodell/London/Prentiss etc. Not a bad career.