If guitar hadn't been written in such an overwhelming way (rival the best in the world), I wouldn't have picked it. However, you can make tons of money if you're among the best guitarists in the world. None of the others offer that opportunity.
If guitar had been written more like the golf one, I would have picked languages. Learning a language is hard work and to be able to become natively fluent in 3 at the drop of a hat would be amazing. In my line of work, it would likely make a huge difference in terms of my salary and being in demand as well.
This was me as well. Best in the world at guitar = Eric Clapton or something...by far the best choice on the list. There are tons of scratch and near-scratch golfers (to chose the best analogy of the remaining choices) that are nowhere near professional.
Now, world-class chef (as opposed to being able to throw together meals from scratch) is another game changer.
Poll Fail