Brendan O'Brien is quite an experienced GA display pilot. I don't know his background nor what he flies these days but I seem to remember 20 years ago he flew a Fournier RF4 in mirror formation with another to the music of Pink Floyd at various shows. I think he also use to land Piper Cubs on top of trucks.
I disagree with your remarks, he's just the stereotypical "cool" guy with a good presenting manner for getting aviation across to the general public. Myself and my mates enjoy watching reruns of this programme, laughing at his "HEY BABY WE'RE AIRBORNE!!!" etc. remarks, and his lifejacket-wearing antics. Indeed, I think the producers are trying to induce some form of sexual implication to aviation, when they feature him "undressing" during the end credits!!!
To the professional, the show is laughable, but we are not the audience it's aimed at. I for one would put bets on he's good crack during a drinking session; certainly would be more of a laid back bloke than many other "professionals" I've met.
Give the guy a break.