I think I've hit a poll once or twice and I would be glad to have it as an option even though, with fic at least, I generally leave feedback. That's because on occasion I have a difficult time coming up with something to say in the feedback. Having a poll option would allow me to record that I read and liked without having to say something specific. However, it's even more likely to be handy with art posts where I have an even harder time thinking of anything specific besides "I like it!" Given what I've heard from vidders, I suspect this would also be true for them.

Since I don't write fic, it hadn't occurred to me before to use one. But seeing your poll here in a meta post, it made me think it would be a great addition to those. Especially since meta posts tend to wrestle with ideas, it would not just be reading feedback, but perhaps voting on particular points of view or ideas in the essay.