As I get older I find I am an early riser and I love getting things done early so the day is my own. (I work but am now on school holidays). This is particularly important now it's turned hot.
Teens are generally in bed until lunchtime, so I considerately wait to hoover until after 9am but I'd prefer to do it earlier. FWIW, DS1 is working in a restaurant so has often been at work until 11pm.
We have no attached neighbours.
Would it be very mean to do the hoovering at 7am occasionally?