A friend of mine has a habit of lifting the bun and pattie first when he's having a burger at fast food places. He also spreads out all his fries on a napkin.
Myself will occasionally but not always lift a bun when it's a burger I never had before. Doing this more out of curiosity. I do take a look after the first bite though.
When I'm at a restaurant I will look over my plate of food but I guess most people do this.
My sister used to literally dissect food before eating it. It was very annoying