I've been interested in NLP for tagging stories based on topics and themes (detectives, werewolves, murder mystery, etc.), so need accurate disambiguation of parts of speech and ways of detecting uses of metaphore, similies, etc. to describe those. I also want to be able to assess how much of the text is about a given topic, so that if I'm interested in reading a detective story from e.g. the Project Gutenberg collec…
I find it substantially better than other tools as PoS tagger.
Also worth noting the that your assertion that you need these features to classify genres isn't obviously true to me at all.