I usually get between 6 and 8 hours of sleep. I used to have fewer more often, but my husband is pretty good about going to sleep at a decent time, so I am getting better. I try to only let myself take a nap if I got less than 7 hours the night before. The problem is, I don't take quick naps! My mom can lay down and take a half-hour nap and wake up to the microwave timer. If I fall asleep in the afternoon it is for 2 hours! I suppose I could set my alarm, but it seems like every time I set the alarm for a half-hour later, it takes me a half-hour to fall asleep and it is for nothing.
I sleep deeper than my husband. He has gone through some experiences where he learned to be on his toes most of the time, and has woken up too easily ever since. It takes him a half-hour to fall asleep at night, whereas I only need 5 minutes most nights. I could probably sleep through a lot of things. But I guess we'll see if anything changes when we have a screaming baby in the house! :)