@less_penguiny: Very nice article, as others have said. It seems like you really nailed a lot of subtleties.
Your article hinted at a problem we all face: sometimes we're left guessing whether or not the other person is intentionally bragging. I.e., there's a problem of ambiguity.
I'd like to suggest a follow-up article: suggestions for how to communicate certain ideas in a way that minimizes the risk of being interpreted as bragging. Or maybe better, minimizes the risk of making the audience feel bad because of the same underlying psychological issues (insecurity, envy, etc.) that get tickled by bragging.
For example, another comment in this discussion [0] points out how someone trying to praise you could be (mis?)understood as actually bragging. It would be awesome to post a catalog of ways people can avoid this kind of ambiguity.