I just recently watched Welcome to the NHK. It was a very good anime in my opinion. It really gives a true perspective of how obsessive people can get with things.
The story centers around Satou Tatsuhiro, a 22 year old young man. He is a NEET (Not in Employment, Education, or Training) and a hikikomori (meaning he has a major case of social withdrawal. He believes everything is a conspiracy which leads him into believing that the Nihon Hikikomori Kyokai (NHK) is an organization that is trying to form a hikikomori world. He wants to break free of the NHK’s clutches but cannot since he fears to go outside. Until he meets Nakahara Misaki, a mysterious girl who selects him for her project and offers to cure Satou of his hikikomori ways.
This anime was very entertaining to me. It made me laugh at every turn. It also reminded me how perverted guys can be. Satou Tatsuhiro reminds me of a blank canvas at the beginning but as the story progresses outside sources start to mold him into something more namely Misaki. It portrays how certain things effect some people such as anime, moe games, and online gaming.
I want to read the manga, too. I have heard that it is a bit better then the anime.