Hentai gets me off, more so than porn. The reason why I think that porn doesn't get me off nearly as much is the fact that I know that the people having sex are just actors. With hentai it feels like there is more variety, it can make me laugh my ass off, it can make me cry, it can give me a warm fuzzy feeling, etc. To me it just feels like hentai has more emotion in it. Maybe I'm wrong, I'm not sure how to explain it.
So yes, I watch/read hentai to get off but I also just enjoy it in general.