I have a 2010 MacBook Pro. I often use it in the mornings and then again in the evenings, shutting it down in the time I'm not using it. I know that you can leave MacBooks on for days at a time on sleep, but it is better to do that or shut it down? Since I've had this MBP for a few years and I have regularly shut it down, would it make much of a problem to let it sleep instead? My only concern for it being left in sleep mode for hours/days is the chance of it overheating or having an issue. Which is recommended?