I tend to sleep on weekdays around 8'5 hours (from 1am to 9:30). On weekends I sleep usually 9'5 hours. I'm not on my 20s anymore.
I don't wake up in the nights (unless I drink a glass of water before going to sleep, then I wake up earlier in the morning usually).
Edit: on summers I usually sleep one hour less (because it's too damn hot in the morning). I hate sleeping during the summer.
Edit: on summers I usually sleep one hour less (because it's too damn hot in the morning). I hate sleeping during the summer.