I have noticed, when compared to other stack sites, this site's users seem to refrain from rewarding a good question. This might be quite subjective, but I do thing as part of a successful Q and A site is the quality and usefulness to future users of the questions, we could maybe do a little more to encourage the practice?
A lot of questions are "why this doesn't work under circumstances that". It is useful (and sometimes even interesting), but not remotely general-purpose question that should gather ton of votes.
I think as volume of users and question grows there will be naturally more votes going around.