Wildly unrealistic situations bother me, so I avoid all the zombie, vampire, were folk, and similar genres as well as sudden wealth (inheritances, law suits, or lotteries). Of course, there’ve been exceptions, usually because I enjoy a particular author. When I see any of those sorts of keywords in the description, I don’t go any further.
While I enjoy good science fiction and fantasy, most non-professionals don’t do it well. Even much of what is published on paper is derivative and unimaginative. What I’ve seen online has mostly been too crudely sexual in nature for me.