An interesting poll, and some interesting ideas presented. As for the presentation itself, I would do something to further set aside each poll option, such as using bold type and/or underlining the name of the choice. Also, putting in the disclaimer that the first choice was not a Hollow Earth story in all caps was a little disjointing. I realize you probably feel quite strongly about the matter, but it is a little off putting to the casual poll answerer

One thing you left out, and which needed to be left out, was the inclusion of the “Other” choice. You are telling the poll taker that you are only interested in writing about one of these choices, so they’ll have to limit their choices to the ones you listed. Good call on your part.