Sometimes it's not up to the parents.
I choose to be independent of my parents. Living at home and having them own your items means they have a certain level of control over you, whether it is implied or not. We (my wife and I) want to live my own lives, and this means we seperate ourselves from our parents.
I barely want to talk to my parents, much less live with them!
But hey, that's just me. If you are comfortable with your life and are happy, then F everybody and what they think of you and your lifestyle. I guess that's some more of my independent thinking coming out.