There are two ways to approach a buffet: what is best for you and what is best for the restaurant. When I eat at a buffet I think what food will provide the most enjoyment while not filling me up to much and thus preventing me from consuming more food...for me, it's protein but everyone is different. Bacon is ideal as it provides the most flavor to food consumed ratio.
Also, I am a big fan of the carving station.
One thing I know for sure...do not waste time on the following: