The biggest buffet selection I ever saw was probably at NEXT at the Kowloon Shangri La, they even had HP Sauce ^

The best service was probably at the cafe at the Omni Royal Orleans about 1 years ago. The Maitre D was excellent and seemed to be really interested in his customers.

Also really liked the sidewalk cafe at the Sofitel Los Angeles a couple of years back and the healthy breakfast buffet they used to do at the Clipper Lounge at the Mandarin Oriental in Hong Kong.

5 essential things for a breakfast buffet:
Kelloggs Corn Flakes
Good quality cumberland Sausages
One of those fancy machines that squeeze fresh orange juice
Fresh fried eggs
HP Sauce

Worst breakfast - Crowne Plaza Kuching - the bread was alwys stale, the orange tasted like it was powdered, all the cooked items were cold....The breakfast summed up the hotel, rubbish