Indeed, as we move into more fundamentally "is there even a right answer?" topics, this becomes more challenging.
Some recent guidance is at
http://blog.stackoverflow.com/2011/01/real-questions-have-answers/
and
http://blog.stackoverflow.com/2010/09/good-subjective-bad-subjective/
Note that the FAQ is pretty good about describing the "please avoid these obviously problematic question forms" part now at
http://money.stackexchange.com/faq#dontaskhttps://money.stackexchange.com/faq#dontask
What kind of questions should I not ask here?
You should only ask practical, answerable questions based on actual problems that you face. Chatty, open-ended questions diminish the usefulness of our site and push other questions off the front page. To prevent your question from being flagged and possibly removed, avoid asking subjective questions where …
- every answer is equally valid: “What’s your favorite _____?”
- your answer is provided along with the question, and you expect more answers: “I use _____ for _____, what do you use?”
- there is no actual problem to be solved: “I’m curious if other people feel like I do.”
- we are being asked an open-ended, hypothetical question: “What if _____ happened?”
- it is a rant disguised as a question: “_____ sucks, am I right?”
If your motivation for asking the question is “I would like to participate in a discussion about _____”, then you should not be asking here. If your motivation is “I would like others to explain _____ to me”, then you are probably OK.