I was keeping it simple. I created the poll more to learn about how to run a pool then for the actuall question.
Run a pool with cute college student lifeguards.
Run a poll with a carefuly planned out set of questions with a specific end result in mind.
The initial question and it's phrasing are absolutely step #1. What seems a logical and astute question to you may not play as anticipated with readers who stumble across it without pre-thought.
This certainly is part of the post title, something which unfortunately is lost on most original post creators. (i.e.: "I've got a question")
The choices must be equally well researched and planned out. This became evident when, as it was mentioned, you missed the Caribbean as a possibility.
Take the poll yourself, then present it to friends without prior comment. If you coach them through it, it is no good. After you use them for an opinion on any given poll, they are no longer a viable beta tester for your poll. Adding your opinion or result to the first post seems rather a bad idea.
Consider the SB option that allows for the voter's user ID to be noted along their choices. I like that you allowed multiple choices instead of the limitation of one only.
They're out of the pool poll, see?