What I Enjoyed: The characters were all engaging in their own way and the portrayals of Sato's psychotic episodes had the right amount of surrealism. The plot developed as smoothly as a story about unhinged adults could and I even enjoyed the romantic developments. The highlight "arc" for me was the RPG arc, I really got a kick out of it. Also, the soundtrack (as much of a mixed bag as it was) was a highlight, due to strong contributions by Kenji Ootsuki.
What I Didn't: The animation seemed like it had been tossed between one average animation studio and three lacklustre ones. The inconsistency of it all annoyed me right off the bat. I would easily take off half the points just for that alone - but I enjoyed everything else about the series so I can't bring myself to.
Final Verdict: A brilliant portrayal of how various people cope with adulthood and all that comes with it, Welcome to the NHK covers a lot of different topics (including the otaku lifestyle) with flair. Shame about the horridly lacking animation.