Bit of thinking: My favourite bit is that it gets me to draw stuff. I have a bit of a procrastinating problem... with art for others, there's the deadline/someone's waiting for this angle, but random art... I have ideas I've ben postponing for years. So sometimes I just leave a prompt for myself so I get off my metaphorical ass and draw it.

And otherwise, getting new ideas presented on a silver platter is great, too - as is having a community that will leave feedback. :)