Who's in Charge

Both The Epic of Gilgamesh and Genesis deal with beings created by god(s). Yet, the authors of Gilgamesh are more concerned with following fate and show many examples of the characters going against the gods' wishes. On the other hand, the author(s) of Genesis are more concerned with pleasing God. Gilgamesh's antics almost always go against was the gods want him to do. He fights and kills the Bull of heaven and he goes on a long journey searching for eternal life (held only by gods). He knows some of the gods have advised him against such actions, but he drives on anyway, and isn't very concerned with the repercussions.
On the other side of things, in Genesis, for example when Eve ate off the tree she immediately felt regretful and guilty that she had gone against God. So it appears that the author(s) were incredibly concerned with doing what God wants them to, and if the characters don't, they show much regret.
I think this is so because the gods in Gilgamesh are more "Human like", such as they have emotions and fight amongst one another. So I think it was easier for the authors to fathom someone going against the gods’ wishes. But in Genesis, doing something against God was a terrible thing because he was seen as the huge untouchable force. Thusly, they were more concerned with keeping in good spirits with God than the authors of Gilgamesh were.