Only if I was nobility and got to carry a sword, wear chainmail and ride a cool horse.
I'd likely be dead by the age of 25, either from war or disease, but that was the norm back then, I guess.
I'd guess 98% of the population were peasants during those times, and I don't think anyone would want to live in those conditions. Jeez, even the king didn't have running water or toilets. Imagine how everyone else lived.