Only if im the largest of the people I am serving. I dont want to load up the plate of someone who's a twig and have half of it go to waste nor do I want them to force feed themselves to spare my feelings.

Though with things like a burger or a steak I usually just hand out a serving when it's done instead of having everyone eat at the same time. So mine is usually the last one and any correlation it might have with being better cooked is purely coincidental, or a result of soaking in the fats of it's departed bretheren, or a result of the fact that I wouldve made any screwups on the first few tries and have mastered what I need to when it was time to make mine.