You didnt have work, kids etc. So if your body could settle its sleep rhythm naturally.
I would be asleep by 10.30pm and up by 9.30am. The minimum sleep ideal for me is 9 hours solidly, but preferable is 11 hours.
DH on the other hand would be asleep by midnight and up at 6am, his natural body clock is better on minimal sleep. Too much sleep and he struggles the next day with tiredness which seems counter intuitive.