I've taken some attempts at drawing, but I was more into realism. Nature is my inspiration, I'd love to be able to draw a landscape. Some of the prarie sunsets are amazing.
My attempts turned out better than I expected, but I had trouble keeping the right perspective, which I think is because I had to look down at my hand too much. When it comes to drawing from imagination, I'm like quantum, turning random lines into something as it goes. A friend who's good at drawing from imagination describes it the same, but his lines begin less random, he has a more clear image from the beginning.
I found a lot of parallels between drawing and playing music, the feeling of tracing an object with my eyes is a lot like when I get into 'the zone' in music, playing music with my ears... Every artist I've talked to knows about 'the zone', I've heard it talked about in sports and I think it even exists in work.
I think drawing from imagination could be related to improvisation, and drawing realism is like learning a composition... The way the mind works in different creative arts is surprisingly similar.