Do All the Ladies Do This?

For the last four-ish years of my life, I generally always stayed up very late, well past midnight to tend to chores that did not get completed during the day and projects that keep getting put off. Now, granted, a significant contributing factor to those late nights were because I was (or would be) up anyway taking care of one of my babies. However, Bradley is a more-than-decent sleeper, and has been for some time (yah, don't hate me - it started when he was 5 weeks old). Not to worry though- I paid my dues in the sleep department with Drew. He did not sleep through the night until he was almost 3 years (not months, years) old and he still has sleep 'disorders.' Anyway, I was explaining to my sis tonight how I have reached the point where it is no longer worth it to me to stay up every night until 12, 1 or 2 am. I have decided if it can't get done before midnight, it can just wait until tomorrow. It just seems backwards and abnormal for me to always be up so late. If I can't call it quits at a decent hour (and we all know I am not the busiest person in the world), than who can? So, I want to know - do you have a cut-off time beyond which you will not continue? Or, do you just always stay awake, late, later, way later, until it 'all' gets done?