First of all, very nice article. Maybe you should link your first two articles for first time readers like me?
Imo, takumi is a good representation although it borders a bit on the extreme side. yes, its very cynical indeed. Its not just otaku's who behave like him. I am sure, even among non-otaku's you will find weird people, its all about your principles and experiences. Takumi is someone who is capable of making his imagination a reality, hence its no wonder he would turn out like this. If you had the power to turn your lies into a reality, wouldn't you choose a imaginary and comfortable world for yourself?
Another thing, the "aggression" that people experience(the senior detective's observation), what do you think of that? Maybe it was just a part of plot(to scare him), but i believe it was related to the sale of gero froggy?
What is your opinion on the muv luv protagonist? A normal harem protagonist suddenly thrown into the alternative universe.