You know, I'm the direct opposite. I can't sleep unless I have atleast one of my desktops on. I need the hum of the fans to sleep.
When I was still living with my parents I had 3 machine running in my bedroom 24x7 and the humming was a bit annoying so I also always had the radio on. Not louder than the hum, but just something to clear out the monotony.
Now I've got my own place, with a special room for the systems and my bedroom's dead quiet.
All my systems are on 24x7 because they're either doing stuff, or I don't want to have to wait for them to boot up before I can use them when I want to.
if it depends only on me i would let them on but the big problem its my litle brother.... :evil: he says that he cannot sleep well with the noise and that he needs all to be quiet... :(