Simply titling the thread "poll" is uninformative and annoys people because they have to click the thread to find out what it's about- if it then turns out to be a thread they aren't interested in, you've officially wasted their time. Some people won't even visit such a thread, and will never know if it was something they were interested in. Giving a thread an informative title (for example, you could have named this one "Poll: favorite boss?") helps people to decide at a glance if a thread is worth their time, preventing people from getting annoyed AND drawing in people that might not have clicked it otherwise.