Where the vast, vast majority of list questions go wrong is they stop being about a problem that needs a solution and veer drastically towards simply polling the community. So much so, that we simply choose to forgo them altogether.
The blog post Good Subjective, Bad Subjective covers this. The earmarks of bad subjective is when the thread quickly fills with many "I did this", "I did that", and "I did blah blah blah" responses. Honestly, if that many people have their own answer, was there ever really a question? When answers don't even purport to explain why their solution is better than any other, it goes from being Q&A to just a poll of the community. It's a conversation starter. Overly broad questions are just soliciting a collection of random answers. Folks will vote this stuff up, but it's just not good Q&A.
The Trouble with Popularity
This is a tough sell, but listen carefully because if you want this site to survive, you need a place where people are asking very interesting and challenging questions, not the uninspired poll questions that have all been asked 100 times before on every other site on the subject. If this site wants to rehash the same old conversations found in any random message forum, there's really no point in trying something different here.
If we can avoid questions that are simply asking, "Let's hear what everyone has to say about…", we can maintain the ideals of great Q&A. This is especially true during beta when you are still setting the tone and topic of what people will bring to this site; and you want this site to be interesting for those who come after.