Mine is a bit backwards from the poll, I leave it on during the night but sleep mode while I'm at work during the day. Trust me Wally I know what you mean about the heat, at my parents house I would leave it on 24/7 and it was in my bedroom, and during the summer it would get pretty warm in there. Now my desktop is in a separate bedroom so not a big deal, plus I got some programs that "do their thing" during the night as well. All in all I just use the sleep mode most of the time, maybe do a complete shutdown 2-3 times a month other than that it's all good
I have mine set to "Let me choose" too. But it never lets me actually choose. When I restart or shut down I have 2 hours of updates that Microsoft forces on to me. Which sucks because when I shut down, it's to take my computer with me.