Auto Return to Sleep after wake up
Can't say I really dislike much about Win 7 - EXCEPT:
It will not honor the "Return to Sleep" timeout value that is in the registry - when the Power Plan is set to High Performance. If this plan is in play - and I need the machine to wake for - say - a backup at 2:00am...the machine will wake okay - and then NEVER go back to sleep.
MS confirms this is - by design. Boo.