I'm not the most diverse gamer, but I do have a lot of genres I enjoy, and many I can't stand.
While looking seraching through NSFW games with filters, I couldn't help but feel frustrated at the overwhelming amount of visual novels and simulators. I like platformers, action games, arcade games, rhythm games, and even some RPGs, but my browser is constantly riddled with visual novels, and because of this, I have to keep switching between the genre filters to avoid them. It's just really tedious.
I think it would be highly beneficial to implement filters with an option to exclude whatever tag/genre you select. Would really save folks like me a bit of hassle.