As someone that participates on SF sporadically, the main thing that turns me off about the current environment is seeing a high volume of down voting without explanation (Basing this on what I saw in Oct / Nov, maybe things have improved). Without explanation it's difficult for an intermediate level admin to understand the flaws in their question.
Here's a recent example of high downvotes without explanation: http://serverfault.com/questions/649936/change-documentroot-of-a-subdirectory-in-directadminhttps://serverfault.com/questions/649936/change-documentroot-of-a-subdirectory-in-directadmin (it also isn't closed)
It's not a great question but the person was down-voted and as of now was not given any tips on how to improve the question.
On the other hand, people seem to do a good job closing poor quality questions quickly.
I like the strict quality criteria, because it makes me think harder about my question before I ask. The excessive down-voting I see on other people's questions however; easily creates a negative perception of the site.