For me, it kind of depends on the day.
Most of the time, poses and expressions come pretty easy to me and I can bang out drawings really fast. Some days, though, I get really tired or something and the magic is just dead. I just have to rest a while or something until I get my mojo back and then it's business as usual.
If you're curious, my comic is My Friends in Distantand.
I draw things that look like this:
And here's my latest page: