I was initially annoyed by the main character, but was loving it by the end. I think the weirdly neurotic narration was reflective of the character's bizarre split consciousness; the alternating stories between the main character and the End of the World were such a fascinating way to present this.
It's funny, the alternation was my least favorite part (I love the book). Not that I can think of a better way to make the story work. But personally I'm annoyed by constant back and forth like that. 18Q4 is similar, and of course many other authors do the same thing. Personally I find it overused. The book is still great in spite of it though.
