Welcome to the N.H.K. is a manga about hikikomori, or shut ins. At first I loved this manga. It came with a japanese pop culture glossary in the back, and seemed very informative. But its granduer ends there. A series of potentially memorable characters are reduced to little more than vehicles for fanservice. There are a lot other manga out there that mock the otaku sub culture. I haven't read them but I know there names well enough. I would say give Genshiken a try, I have never read the manga though, but it must be better than Welcome to the N.H.K.