Weirdly, I'm both.
It's 06.30 in the morning on a Sunday here, and I'm already up and awake and getting ready to draw. But I also got to bed at midnight last night.
I like getting up early in the morning - even on the weekends - because I like getting an early start on working on the comic. If I focus, I can finish colouring a page before lunch, which means I have the afternoon free for talking a walk, or working on other things.
But I also like staying up late, because there are no distractions then.