Well, it's like anything else, but different simultaneously. Some is ecchi (raunchy) some is drama, some action, et cetera. There's many subgenres. Tokyo Ghoul I think is considered a dark thriller, with partly action, and drama. You'll just have to see for yourself. The more you watch, the more it opens up until the big change at the end of the first season. That change is also why I think you should stick to it if you don't like it prior.