I've got a few different sleep schedules.

Normal mood: I need about 8 hours. May wake up once or twice for a few minutes. Dreams not too common.

Up periods: - can't fall asleep
- less than 6 hours of sleep
- frequent waking up
- waking up hours early
- Not tired at all
- vivid dreams

Depressed periods:
- exhausted even with 9 hours of sleep
- nightmares
- may wake up extremely early and be unable to sleep, despite being exhausted