I don't think Harry is arrogant at all! Harry's never like "I am the best!"...okay, maybe he brags a bit...but come on! Who doesn't? Anyway...if you call playing Quidditch the best you can being arrogant...then, yes maybe he is arrogant! But he's not, I say! lol
I think we all have HPish dreams once in a while..I know I do..hehe! lol