As usual, thought provoking stuff from the dude with the awesome Sagat AV.
I'll acknowledge there are plenty of people who one does not need to meet to know whether they are a good person or a bad person. That's a fact. But I'd hope people would also acknowledge that often professional fighters are playing a role which will benefit them in their careers - in fact I'd say Conor is one of the best examples of that - and that he cannot be known all that well just from his edited, scripted moments on screen.
Someone like Jones, who is involved in a hit and run and returns to grab his cash 'n' stash obviously lacks some sort of moral imperative and we may not need to meet him in order to determine he is likely a bit of a prick. But often things just aren't that simple. You (and I) may find Conor's character offputting, but I am willing to bet that he doesn't behave like an obnoxious wanker at all times in his private life.