Neurotypicality, towards spesh people.
I find boasting pretty pathetic usually. There are things worth feeling pride over, and that do give some boasting rights, achievements. When people just go all out to make themselves feel like the big man to others, thats just wierd and stupid.
What else....
Islam. I've noticed that many of the very dirtiest pakis boast about how 'good' a muslim they are, and how islamic they are. As if its some sort of achievement to wank themselves off over allah, sort of as if they feel somehow special about being another one of the god knows how many billion muslims there are on the face of the earth there are. Other religions are guilty of the same, but islamites seem particularly prone to this particular sickness. It strikes me as strange, when religious people boast of how much more religious they think themselves to be compared to others of the same (or different) religions.
Hey everybody! look at me, look how much I believe in my personal favourite fairytale. Not sure if I find hardcore atheist boasting more, or less pathetic, or pathetic to the same degree as religiomania, but I find it pretty stupid.