Can you write romance? We talk about SALES on this blog, because our tagline is: “professional writing for love and money.” The “love” is just as important as the money, if not more important. Fiction is all about emotion. You need to be intensely involved in your fictional characters’ emotions. Arouse them in yourself, and you stand a good chance of arousing them in your readers.
My point: romance sells well, but if you really love to write suspense, or fantasy, or anything else – go with what you LOVE.