I wore the hospital gown for labour too but I felt much less like a patient the second I put my own clothes on so maybe there is something to be said for wearing your own cloths. While I was in the ante-natal ward and afterwards I mainly wore tracky pants and maternity tops. Wearing PJs during the day makes me feel like an invalid.
I took a few of those 3 packs of granny nickers that you can buy in supermarkets with me so that I wouldn't ruin any of my normal nickers.