This really depends on how bad the depression is, but in a particularly bad day...if we're not going anywhere I tend to want to just sleep all day.
I remember when I first got off the meds they had me on in the hospital, I finally felt how bad the pain from the depression was for the first time in forever.
It felt like every inch of my body had been hit with a truck or something...it ached everywhere and I didn't want to move or do anything, and I definitely didn't want to eat.
I guess when you deal with it for long enough, you stop noticing how bad it really is. It becomes easier to just start feeling like that's what "normal" is for you.
I notice that when I get really depressed, I lose my appetite pretty much entirely and have to choke down -something- just to get my mother to stop worrying for a while. There's been weeks at a time where I have no desire to eat at all, to the point where even my boyfriend started to worry (he's not here, so he doesn't have a chance to see how little I eat when I get like that.).
But if my mother or I are going out somewhere, we extend the shopping portions to a few hours at a time just to get away from all the stress and negativity in the house...we don't really buy much, but it's so nice to just stop having to think about all the bad things for a while.