Verbeia suggested here: https://genealogy.meta.stackexchange.com/a/1701/104 that more self-answered questions might be a good move for the site. I happen to agree, but if the community as a whole doesn't concur, it might do more harm than good.
So: Would we be happy to see more self-answered questions? Are there any particular criteria they need to meet above and beyond the standards we apply to all questions?
ETA: The sort of self-answered question that might find a useful home here (and it might not even need to be self-answered) is: What finding aids and sources exist online for researching immigration into New Zealand in the late nineteenth century? Yes, the FamilySearch wiki provides copious detail on research in New Zealand, but not a potted answer to that exact question. Archives New Zealand talks about their own holdings and then suggests Google (!). So a curated answer here on the topic would perhaps not be redundant.
One situation in which this might arise is if somebody faces a genuine problem (how to start researching in an area unknown to them) and, being a good GFH.SE citizen, heads off to Google to do some digging. They don't find a concise answer to their question in a single place, but find enough information in a few places that they can construct their answer without needing to ask here. In which case, 'making the Internet a better place' and building 'a comprehensive library of answers to questions about genealogy and family history' could include posting their original question and the answer that they've developed for others to benefit from.