Buffet - - - - - - -

[Carsman]

If there's a server filling up water glasses,bringing new plates and utensils, clearing tables.......I tip the same as for non-buffet dining. If it's largely self-service, I'll leave a few dollars on the table.

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Exactly. (so 20%)
At a buffet, I don't "pile" up food on my plates, as some people do.
I place small portions of food on my plates as if it was received in a restaurant.
Therefore, I go up to the buffet around a dozen times, between the salad, soup, entree's and desert. Requiring the attendant returning to our table a dozen times clearing the plates, as well as refill my beverage glass. And then bring/serve coffee at the end.

In a restaurant the server, although brought the food, only comes to my table around 3 to 4 times. (so 20%)