If I'm wet, Ill probably keep it on all day and most likely sleep in it as well, regardless of who I'm around. A lot of people say they don't like when it gets hot and saggy. That's the best part to me!
If I've messed and have the whole day to myself, I'll keep it on all day until someone comes home. With the windows open of course *even though thats kinda tough in winter time*. It really depends. The more I've messed, the less I keep it on, for obvious reasons. I am also aware of it being unsanitary. I've only like, you know, totally and completely filled my diaper *with poop* to the point of leaking maybe twice. I wish there was a way to make poop not stink...other than chlorophyll tablets, i cant seem to find them anywhere....
When I look in the mirror, its almost impossible to NOT get turned on by looking at yourself in a saggy, yellow & brown diaper. At least for me. :]