When Seth and Maggie are in the lab. Maggie asks Seth to give her some blood. He says no so she draws some of her own. She then sets it up to look at the blood cells through the microscope. She first looks in then has Seth look into it. Right before Seth leans over to look in he rubs his nose. It is explained in the movie that angels have no fear, feeling of touch, don't eat, can show themselves when they choose to, and can hear peoples mind(as Nathan shows). It is clearly show when Maggie has him cutting the lettuce and he runs the knife right through his thumb without any reaction like a human would. Seth even explains it to her shortly after that incident occurs when she is yelling at him and he tells her he can't feel anything. Since Nicholas Cage character Seth has no feeling of thouch he wouldn't be rubbing his nose like he is feeling an itch on it. This is not a nitpick on the characters behavior and/or personality. It's a nitpick on showing him doing something that Angels don't do.
