I generally like writing, I can certainly fill out apps but generally don't find it as enjoyable. Face Claims are hard to decide on! Signatures and graphics required??? expect the bare minimum.
When posting, I typically go 300-500, but have been known to do shorter when back and forth dialog would be more fun than long monologues which don't leave much room for interaction. Also, I have written entire threads on my own when the story strikes me. In return, I mostly just ask for something that I can reply to. I enjoy a quality interaction compared to a properly formed word-smithing. I typically have maybe 2 nights a week to really dedicate to replies. I work, commute, and raise 2 little ones. Getting to sit down is a luxury, let alone thinking about something.
I like the supernatural concepts because who doesn't want a little magic in the world. If science fiction is the theme, that is just a little "magic" compared to today's daily drudgery. I am pretty flexible if the site lures me in with a good story. I don't specifically shy away from any styles or themes of writing and am willing to happily write anywhere within the typical 3 3 3 mindset., this can be paired back if needed for the sites.