Stackoverflow is so good.. anytime it's not stackoverflow, I'm sooo disappointed. A feature that I miss on stackoverflow would be a way to still use it on "incorrect" questions. For instance, someone asks "What's the best Linux distribution?". Obviously, it will be flagged and closed because it will most likely create a debate rather than having a strong and unique "best" answer.

However, it would still be interesting to have another tab, say "Discussion", where people could shoot arguments and the best ones could still be upvoted. So, yes, there wouldn't be "one best answer", but it would still be fun to read the best answers.