We should probably drag this sort of thing to the "not food" board, but I'm going to stand up for Mario.
I haven't seen the show you're speaking about, but his "Molto Mario" and "Mario Eats Italy" shows are all about the food, and not about him. His appearances on Iron Chef America haven't been quite Chen Kenichi humble, but they've been respectful and playful. I like the guy. I'm planning to go to one of his restaurants when I'm in NY in June.
Don't get me started on Bobby Flay, though. There's a posterior orifice for ya.