Recommended Sites
akobu.com: Over 850 prettymuch exclusive hentai mangas, dojins, artwork, etc. This is probably the best site for the content it offers.

alphahentai.com: if you're looking for a very good updated free hentai site this is it. This site is definitely worth a bookmark.

Adult GameGirl Comics: Plenty of hardcore adult comics(dojins) from popular games and anime series such as DOA, FinalFantasy, StreetFighter, Zoids,etc.