I hear you, its really a matter of time. I would like to do a lot of detail for every drawing, with good inking and lots of contrast, but instead of a pic taking me about 20 minutes to draw it would take me about 4 hours
I'd rather do a bunch of quick fun sketches rather than labor over one or two, especially since I'm giving them away
(Plus, I am using really cheap printer paper to draw on which tends to curl when you put too much ink on it)
That said, I've been experimenting using the paint bucket tool to fill in large areas with black...