I’ll gladly pay to see a rematch using MMA rules.
Mayweather isn't MMA, and McGregor isn't a pure boxer. That's why this ‘fight’ is a scam that will still make both of them rich-er, along with the promoters. It just doesn't make much sense. If you matched up the world's best swordsman against the worlds best sharpshooter, and started at distance, guess who would win.. Doesn't mean the swordsman isn't great at what he does.
As far as ‘street fighting’ and all the tough guy stuff, neither of these guys would last long. It's those who have no problem shooting you, slicing your throat, or hitting you over the head with a baseball bat who have the advantage.