I wouldn't have any problem with Hatton at 1 if he beat Mayweather.

That would be beating IMO clearly by far the best fighter in the world. And I never bought into the Tsyzu was shot theory (Castillo on the other hand was a bit shot IMO) so that's two great wins. That and he's undefeated.

Not saying I'd lose it if he wasn't number 1, I don't really like watching him fight anymore, but I wouldn't have a problem with him at that spot.

Who would be above him? Pac, Winky, maybe JT, maybe Rafa although as much as I like Rafa that might be stretching it a bit. I'd vomit all over my apartment if Taylor's ever made number 1 but I guess you have to admit he has fought great competition.