Buffet food at Qasr Al Sarab was definitely top notch. Normally I don't like buffets, but this was really special.
I also like the buffets at FS Bosphorus and the new Sunday brunch buffet at Trisara (adults only - and they arrange activities for the kids whilst you dine).
Sunday brunch buffet at FS Singapore is very good.
Club lounges - FS HK - great cook to order breakfast + buffet.
MO Geneva - buffet + cook to order breakfast.
All-inclusive food is of a very high standard at Ballyfin, Ireland.
There are probably loads more examples, but these are the ones that come to mind.