No, I would not enjoy living in a castle as a peasant. This is because I like to be independent and if I worked for a lord I would feel like he owned me.
Sure, I would like to be a peasant linving in castle. I mean first of all I would live in a Castle! And the lord cared for peasants and didn't treat them like slaves and they got to have fun and be entertained.
If i was a peasant living in a castle, i'm sure times would be hard and times that were fun but i would enjoy it! Living in a castle couldn't be better than living on the streets as a peasant so yes, i would.