One thing that really is not excusable in my book is when food is served to you partially warm. I understand that the food has been sitting in the deli cooler, but deng. Take that extra minute and heat my food up correctly.
I ate a ham and swiss quiche. It wasn't warm. It did taste good, though I've had much better in France.
I tasted a friend's ham sandwich and the bread's denser than I would like. He enjoyed it though.