Ultimately, for me, it depends more so on the concept rather than the genre unless I'm specifically looking for said genre(s). However, I have taken to fantasy/historical/medieval/horror RPs like a fish to water in the past (and still do). Such a thing happens when you have grandparents (especially my grandfather who I found out was RPing AD&D back in the day) that enjoy stuff like that, though my interest in horror stems from myself. Personally, I'm not a fan of spooky, scary physiological horror like you'd see in your common slasher flick, but rather, more so survival horror like that you'd find in apocalyptic stories. Dark Fantasy is another good "horror" genre, but it usually teeters the edge between actually being horror-inspired or edgy and grimdark.