Our personalities creep up on us in unexpected ways, and that doesn't stop when we close our eyes at night.
Some of us can't keep our gadget addiction at bay. Some sleep splayed out to all corners of the bed. And some of us wake up surrounded by half-eaten food.
Check out this infographic from hotelcontractbeds.co.uk to help define your sleeping style.
And if you're a troubled sleeper, click here for some advice from an actual sleep coach.