Not all competitiveness manifests itself in the same way.
Legolas is unbearable when he wins. He is smugness personified.
Gimli pretends to be dumb and recounts all the kills he gets in a drawn out way so everyone can see how clever he are.
Aragorn takes immense delight at the failings of others.
And Boromir has somehow figured out how to channel his competitiveness in a humourous way.
Thomas Duggan 