I was just curious if it can be bad to let my MBP go to sleep and waking it about 10-12 times a day by closing the lid and opening. I work on and off on it and sometimes will close the lid and reopen in the 15 minutes, or go 30 mins, or 1 hour...but I was concerned because I hear that little noise of the hard drive waking up every time I open the lid. Would it be better to just leave it plugged in and awake with caffeine? Wouldn't this shorten the screen's life?