I guess I'm in the exhibitionist category too. I never would have thought that!
My son is 2 1/2. We don't close bathroom doors to go potty, and part of that is to get him used to going potty for his potty training, but even before he was born, we often left the bathroom door open. I change in front of him if he walks in, I occasionally shower with him when he wont nap or something and I dont have a choice. My husband is out of town a lot, so I only get to shower while mine is sleeping, and occasionally my plans for the day don't work. out. I don't co-sleep naked, and yes, I agree that would be weird. But as far as being naked in the normal course of getting ready to leave the house and bathing routines, I see nothing wrong with a 2 yr old seeing me. I don't try to hide myself while I am using the bathroom, and don't plan to. I am definitely more of a prude about it with girl children and daddies, so I don't know how I'd feel about hubby being the same way if we had a daughter, but we don't so it isn't an issue. I figure we will stop the nakedness when someone is uncomfortable. And when I can close the bathroom door without worrying if he is scaling the china cabinet in the other room.
I agree it is usually the same as how you were raised. We had all girls in my house except for dad, and he was the only one who stayed covered. We kids did once we were older (maybe 8 or so?) but mom would usually get ready for work just wearing her bra and slip. But no one just walked around naked for no reason.