Something I've found interesting of late when reading Genesis 18-22 is the means by which God visits people. He calls from heaven, gets his angel to call down from heaven, he sends a posse of 3 blokes who then become 2 angels on the way from Abraham's place to Sodom. Sometimes the messenger seems to be speaking, at other times it's Yahweh himself who speaks. An interesting set of interactions.
I'm wondering now what can be made of God's choice of method, and the fluidity of the change from 'men' to 'angels' in the story of the men of Sodom's rape attempt. Why did God choose to interact with people in the specific way that he did? Is it supposed to tell us something about the nature of the interaction?