Just 10 more minutes of sleep seems perfect. Hit the snooze button and drop into dreamland. The problem is that your body restarts the sleep cycle, sending you into deeper stages of sleep. Ten minutes later you probably won't feel refreshed. Instead, you'll feel groggy, according to circadia.com.
It’s best to set your alarm at the time you really want to get up and always get up at that time. Your body will slowly prepare itself to wake before the alarm. You'll feel more rested and alert.