Yep, I've been in a similar situation where I had invited a couple over for dinner, and I was grilling a London broil. After they arrived they said they only ate their beef well done. The entire meal was ruined for my husband and me; they said it was good, although I can't imagine how it could have been; it was so tough you could hardly cut it. Since then I've been careful to choose a menu where well-done beef doesn't come into play.