It depends on the poll. If it is a fun, trivial poll then I really don't care if it is anonymous or not. If it is a poll that is controversial and might lead to a debate then I would rather keep it anonymous. If I feel strongly about the issue then I might also post a reply. But I want to be able to vote in the poll (regardless of whether I want to post a reply or not) without others knowing how I voted on controversial issues. I do agree with others though that if it is not anonymous and I don't want people to know how I would vote, then I would just skip that poll.