05:00 on workdays, meaning I can be out the door just after 06:00 and at work by 07:00 - a least worst choice as it allows me to finish at 16:00(ish) and at least have a pretence of a bit of down time in the evening before bed.
Weekends? Depends on the time of year, summer 06:00-06:30 so I can get out early for a few hours ride and be back with enough time in the day to do family stuff. Winter a bit later as it's at least nice to have a semblance of daylight when leaving the house.
The attack terrier is genetically unable to sleep much beyond 06:30-07:00, so that's about it for a lie in, unless one of us gets up and lets him out then comes back to bed.