Welcome to Community's Feature Request Board! Before getting started, we recommend reading through our Feature Request Policy & FAQs for best practices before posting. Thanks for being part of Community!
Sometimes when I'm listening to music I would like a station based on characteristics of two different genres, and I don't know of any artists or genres that combine them. For instance, I know of no music with a string quartet and syncopated rhythms, so I can't make a station for it even though I know what the relevant characteristics are, or at least could figure out which they were from a list.