Petacchi a bit head? Have you ever read/seen post race interviews w/ him? He always gives huge kudos to his team. He is 100x more humble than Cipo (aka horse face). For as good as Petacchi is, he should have a sickening ego - which he does not. Hell, even Boonen isn't bad at all.
I guess a question is... Have you ever won races? Can you relate to someone who wins often? Winning takes a certain personality type as 99% of guys who race (pros through Cat 5) never see the finish line 1st.
Not trying to be a di#k, just saying that Petacchi is quite humble for as good as he is, and Boonen is far from being a conceeded a-hole too.