My most memorable CO 1st class dining experience was the FA getting distracted before getting to me with my beverage and nuts, then engaging upfront in chitchat with another FA. When he finally got back to my seat I asked for the drink and nuts and he said "you don't get seconds, and any way we're out of nuts". When I responded that he never served me the first time he left, returned with the missing nuts and slammed them on the tray.