What is Beowulf's Nature?

Through out the whole poem I could not decide on what kind of person Beowulf was. In the beginning he came off as a genuinely kind young man who was set out to help other people in their troubles. But some parts of the poem made me wonder if Beowulf was a vain, selfish man who only cared about popularity, and fame. The two prime parts of the poem were the two main battles that Beowulf fought. The first one was against the demon, Grendel, and the second one was against the dragon. The two battles show two different sides of Beowulf that is hard to put your finger on.
In the beginning of this poem the narrator makes out Beowulf to be the greatest hero in the world. The narrator gives off the impression that Beowulf is a brave, kind, strong, trust worthy man which gives the reader the idea that Beowulf has come to the land of the Danes to save the people from Grendel out of pure kindness. Beowulf makes an interesting entrance to the poem. He does not introduce himself until ...