Beowulf..what a arrogant little butt :]

Currently I have seen at least 2 versions and read 2 versions of Beowulf, what I do not understand still is how someone can truly be so cocky, arrogant and foolishly adoring of themselves. There have been many other "superheroes" other than Beowulf and they did not gloat, tell amazing, outrageous stories of their triumphs or anything of the nature; they have been humble and gracious, almost as to hide their special gifts. I like the movie X-Men so I'm going to relate to that; Rogue for example has the ability to absorb other's powers, thoughts, memories, ideas, etc from touching their skin. She does not necessarily like this ability because she is unable to show affection to those she loves through touch, because she can possibly kill them. She finds ways to cope with her differences and learns how to deal with them, in a place where people like her go due to their differences; a "safe haven" one may call it. She has this amazing power of knowing what others only dream of knowing, yet she does not gloat or tell outrageous tales because she has this amazing ability; she only hopes to be more "normal" in order to fit into her lifestyle so she can love the man she has fallen for. Beowulf in my mind tells this outrageous stories, I think, to hear his own voice. So he can tell himself he is great and make others think the same of him; rather than just realizing he has done great things and being humble and gracious that he has this ability to help others in need.