My worst was a barbecue I gave when people asked me to cook their steaks without specifying how they wanted them cooked. We were all a little over-refreshed. Then everybody bitched that they were overdone. Well, I like my meat medium-to-well done!
The best had to be a Christmas dinner I cooked about 15 years ago. I spent days on the turkey,stuffing and trimmings, and it was worth it. But it wouldn't have been the same without my friends and family.
The worst Christmas dinner was at an English friend's house. The goose was half-cooked and fatty, the mashed potatoes and gravy were lumpy, and the vegetables were boiled into an unrecognizable mush. The dessert was good -- I made it -- and we all just drank a lot and had fun anyway. Even my friend admitted it was lousy and sent out for Chinese food.