There is virtually nothing you could put out on a buffet table that I wouldn't eat unless it was one of those 50s US salads with lots of jello and marshmallows that I've seen pictures of.
Lots of really good sandwiches, all different fillings, cut into little triangles so I can delude myself that no matter how many I have I'm probably only eating the equivalent of one normal sandwich 
Pork pie - Melton Mowbray
Cheese - lots and lots of cheese. Could be on sticks with cocktail onions or pineapple cubes, or on a cheeseboard. None of your mild Cheddar muck. I want the sort of cheese that makes the inside of your mouth pucker up with its strength.
Cocktail sausages still warm from the oven and glazed with honey and mustard
Breaded prawns, still hot, with a good dipping sauce
Mountains of crisps, preferably posh ones
Cheese straws
Quiche Lorraine, preferably mini ones rather than slices, as they're easier to eat - other sorts of quiche also extremely acceptable
Fruit platter
Something sweet with about a million calories to finish off
Plenty of wine
Now ravenous. 