"Poll"-type questions aren't appropriate here: "Who was the most influential person in history?" or "Who was the worst general in your period?" or "Who are your Top 10 favourite people in history?" If your question includes the words "most" or "least", or "best" or "worst" (or can be reworded to include these words), it's probably a "poll"-type question. These questions do not lend themselves to answers with a firm foundation in sources and research, and the resulting threads usually turn into monsters with enormous speculation and little focussed discussion - and, as such, are banned here.

This is explained in more detail in this [META] thread.