Exaggerated: Seamus does all of the above, plus wearing cosplay to go buy milk and bread, working gratuitous Japanese into every conversation, rarely showering, and being heavily into lolicon and/or tentacle hentai.
Downplayed: While Seamus does appear at first glance to be the stereotypical otaku, once others get to know him better they discover that he does have other interests, even though anime and manga are his favorites.
Subverted: Seamus likes anime, but leads a functional and productive life.
Double Subverted: But he is mentioned as being in financial trouble, or facing the threat of a divorce or breakup, because he allocates all his money towards his geeky collections rather than food, rent, bills, etc.
Zig Zagged: Seamus at first finds anime and manga incomprehensible at first, but then gets a job teaching English in Japan, where he discovers several anime series that he likes. He then immerses himself in otaku culture to the point where it becomes an obsession before his friends arrange an "intervention" to bring him back to reality.
Lampshaded: Even though Seamus lives in his parents' basement because he can't afford an apartment of his own, he mentions to his friends that since he doesn't have to pay rent, he has more money to spend on anime merchandise.
Invoked: While cosplaying as his favorite anime character, Otaku-Man, Seamus goes to a nearby bank to make a withdrawal only to run into a bank robber. After stopping the robbery, Seamus explains to the police that he stopped the robbery because "that's what Otaku-Man would do."
Exploited: A lady friend of Seamus', finding him attractive, decides to dress up as a character from one of his favorite Harem Genre or Magical Girlfriend anime in order to get his attention.
Defied: Seamus decides to branch out a bit more and find some interests and friends that don't necessarily have anything to do with anime, manga, Japan, etc.
Conversed: Seamus' best friend Terry calls up to ask if Seamus watched the episode of their favorite Crime and Punishment Series last night. The two then discuss how the writers showed the guest otaku character as a typical geek instead of a real person, and how the writers could have done better that episode.
Reconstructed: The series makes it clear that not all nerds and geeks are like this, and that most are, in fact, quite happy, productive, and well-adjusted people.