Sleep fascinates me! I used to sleep 7.5 hours pre kids but now I've changed and am happy with a stretch of 5-6 hours. I tend to have a couple of 6 hours nights, a 7 hour night, a couple of 5 hour nights and a 4.5 hour night in a week...averages under 6 hours over the course of a week.
Can't blame DD, she usually sleeps through these days but seems to have inherited from me the need for less than her peers. She's 2.10 and sleeps on 9-10 hours per night.
What about other mumsnetters?