I'm attracted to how certain people on the street may be standing or gesturing. It occured to me that these poses are actually tried and true positions that are frequently used by models. Crossed legs, arms behind the head, and props make a picture more interesting. Here are some pictures I've taken that may look posed but they weren't.
Here was a smoker on a break.
This woman was waiting for a bus.
The arm behind the head pose.
This one is more like a commercial but was totally unposed.