Before my trip to CA I liked my steak well done but down in Cali it seems like everyone likes their steak medium rare. I had never tried it so I did and loved it, very good.
As far as burger goes it has to be well done. I know way too much about the farming industry and even meat cutting so I want it to be well done since burger is ground up meaning more surfaces exposed to germs and all. With steak as long as the outside is cooked its ok. My ag knowledge also prevents me from eating store bought eggs. The "cornish game hens" are also kinda a 'bleh' to me because they are not Cornish, games, or hens but really a hybrid young (couple weeks old) cockerel (young male).
Anyway back to the main topic. My a teachers husband likes his steaks blue as he calls them. He likes it when they are pulled from the freezer then tossed on the grill for just long enough to thaw it around the sides and still be frozen in the center.
And like others have said it all depends on the kind of steak...