I will draw him soon, then, he sounds very cool.
He's different from most of the other Angels in that while he obeys what he is told to do like all the others, he officially "condones the sins of man" rather than openly scolds/chastises them for it like the other Angels do. I don't know what the significance of him "condoning" humanities sin's is, but it's one of the most commonly mentioned concepts about him.
Either way, he's apparently one of the oddballs amongst the upper echelon's of the Angel hierarchy. If I remember correctly, he's in his own caste or whatever you call it. He also answers to no one but the Christian God. Even the other ArchAngels can't order him around. He's not one of the 7 ArchAngels, but he still commands the same amount of authority. In some cases, he is considered even stronger than Michael, the strongest of the ArchAngels, and in others he is considered his equal.
I know that when Lucifer attempted to have Michael side with him during the War in Heaven, the fact that he ALSO considered Samael, is meant to express how powerful Samael supposedly is since its said that if Michael HAD joined Lucifer, the Christian God would have lost the war. For whatever reason, Lucifer felt that Michael was the more reasonable of the two. Dunno what that says about Samael but eh...
In a way, Samael has some intriguing similarities to Lucifer before his fall.