I typically hate it when people get generalized into two different categories, but in this case it makes a ton of sense. I just have to post this because it's so relevant. This video really sums up a major skill deficit I have with design. I know I'm not alone on this one.
I seriously didn't really didn't get into sci-fi/fantasy until I found CA.org. This means I have only been developing a visual library for those two prominent genres since 06.