As other have said, everyone is different. Personally even though I like sleeping in because it means I can stay in my bed away from noise, I feel a lot better during the day if I only get around five hours sleep as opposed to seven hours.

This has been the same case for many years now and it's regardless of my mood. I've only been getting around four hours sleep a night this week and I feel better than I did when I was sleeping about eight hours a night last week. I'm looking after a relative's house while they're away this week and that means getting up earlier.