There is an interesting online discussion about adult children living at home happening here. The questions up for discussion are:
Do you live in culture where it would be considered inappropriate to move out of the family home before you are married? Are you a parent who feels you have brought up your children to the best of your ability and now its time for you start enjoying life as a couple again? or are you a twenty something desperate to strike out on your own but constrained by the cost of it?