"Ah, short trip!" - Captain Jack Sparrow in Pirates of the Caribbean: On Stranger Tides
"I call it luck." - Han Solo, Star Wars (1977 - not going to say "A New Hope," because that was not the original title)
"I'm awesome." - Barney Stinson from How I Met Your Mother, not sure about the episode's name, but Barney is played by the legendary Neil Patrick Harris. Need I say more?
Quite simply, I think that the difference lies on two things: whether one is really as great as one thinks or is kidding oneself; and whether one lets pride get in the way of the continuation of one's success. Savvy?