I used to be an owl, but I also need 8-10 hours sleep (ideally) and I now have a toddler who wakes up at 6.00-7.00 (which I know is good for a toddler!) so I've had to force myself into early bedtimes. The days are getting lighter though, so my urge to hibernate (which kicks in about the start of November) is wearing off - I love the cold clear evenings you get in late January/early February.