We've had a few polls here, but I'm not convinced that they really add much.
They tend to attract a pretty low response, but simply because it's a poll the results tend to be given more credence than they are necessarily worth.
I may be persuaded to start a poll from time to time if I reckon it's an important, interesting or useful topic but I don't particularly want to have a rash of pointless polls all over the place!
John
PS Just seen Jackeen's post -- perhaps polls would be a good things after all