Coming from the PC world, i havent turned off my computer in 3 years, except during hurricane sandy and 1 other time where there is a power outage. My pc is on 24/7 for pretty much 3 years straight, as i have instant message and various server software running on it. So with this iMac, it looks so delicate.. i am afraid to leave it on like that. Of course i will turn off the display, but currently i have computer sleep = never, do you think i can just leave it like that for the next couple of years? just turning off the display at night but leave imac on with sleep = never. What does everyone else do?