Re: Admiring the "wrong" characters.
Interesting question. I would say it depends on what type of analysis you were going for. Personally, I think people focus on Tyler because the narrator is little more than observer rather than a doer (at least before the final act). It's only when he ends questioning Tyler and Tyler abandons him that he becomes an active, rather than passive, participant in the films events. Before then, what does the narrator do that's really all that significant?
The other problem is that in the context of the narrator, Tyler becomes little more than a raging Id, which I think makes the character a little less interesting to analyze.