Pompeii is such an amazing archaeological site as it was frozen in time. Nor gradual decline. It really shows how the little things stay the same throughout history. From humor, to in this case, the presence of street food. I don't think there is any city we have found that is so preserved in time as Pompeii.
My favourite thing from Pompeii is the preserved graffiti. It's so easy to think of ancient people as being completely different and alien from us in their thoughts and behaviour, and then you see a bunch of 2000 year old dick jokes scrawled on the walls
My fave:
It's basically a 2000 year old twitter time line.