Ultraman

Why many quality steak restaurants ask you how would your steak to be cooked, from blue rare to well done? If medium rare should be the only best choice. Isn't it a personal taste?
While many people enjoying rare, even blue rare, medium rare is already too over-cooked for them. But there are also people love medium well to well done and think those people putting raw meat into their mouths are like barbarians.
Just cook to the way you like the best.