My hog island boa will wait for me to get home every day to stick just the first 6-8" of her neck out of her hide so she can see what I'm doing when I come in. I didn't really notice it at first and just assumed she always kept her head out but I started looking in the cage as soon as I'd get home and she wouldn't be out and within a minute she'd rearrange herself so she could stick her head out and watch me.
On the weekends when I'm home all day and night she usually won't even put her head back in her hide, it's like she knows I'm still there even if I turn the lights off and just sit there playing a game or watching tv, somehow she can tell that's different from when all the lights are off when I'm not home.
My albino doesn't really seem to care either way, although he is one, like it seems a lot of others, that like to perch on my head when I have him out. Luckily he's still small enough to do that.