I will admit that it depends on what I'm writing. I have done 1, 2, and 3. Though most of my work would probably fall under Normal-wierd.
I don't think I've ever been further than three, but now I kind of want to just because Bizarro sounds so cool
The border between something conventional like Dr. Who and something "unconventional" like a lot of Bizzaro lit is that, while Dr. Who or Star Wars or whatever might have content that contrasts with the everyday experience of its audience, the structure of the narrative is the standard one, and readily intact. The audience receives pleasure from the novelty of the special effects, but their perception of how the universe works, and their values, are comfortably unchallenged. (In fact, the more "science fiction-y some stuff is, the more conventional its values can be). The border into experimental lit (which I think the author calls "too weird") seems to happen when the conventions of narrative are challenged, possibly along with the values of its audience. This can create a really challenging reading experience! It also supplies the important voice of an otherwise silent cultural sub-conscious. It's fun and interesting to look at those experimental and bizzaro tex ts and see, from a technical standpoint, just what it is about their grammar/content/structure that identifies them with the fringe (or even beyond the fringe) of mainstream books and stories.