Shameless plug. I did some analysis on closed and deleted questions on StackOverflow posted between 2008-2014 [0, 1]. The key findings from the analysis were as follows
* Closed questions due to the reason "subjective" are very popular amongst the subscribers but not in line with Stackoverflow rules
* Closed questions with reasons "duplicates" and "off topic" are the prime question areas for reputation gaming
* Deleted questions are very low in quality and are pretty much unrevivable with interference, unlike closed questions. Pyramidal structure of decreasing quality - Normal -> Closed -> Deleted
* If your question is accidentally deleted, such ones are revived quickly
Some side notes
* Deleted questions are clearly against guidelines and the style of writing is enough to give away these questions are just poor even without the actual content.
* Most closed questions are relatively good in content quality but against site guidelines (off topic, subjective etc.)
Personally, I see more often than not that people are just annoyed they can't ask their question on Stackoverflow rather than accepting that SO isn't the right place to ask their question. In addition, I also see answers/comments very hostile and don't lead to constructive feedback. A typical example of this behavior is Person P asks Question Q. An expert E makes a comment "Why are you doing this? You shouldn't do this - this is not the right away". Such a comment is not helpful because it passes a judgment on the approach of the question rather than answering it even if the question approach was not correct.
* Closed questions due to the reason "subjective" are very popular amongst the subscribers but not in line with Stackoverflow rules
* Closed questions with reasons "duplicates" and "off topic" are the prime question areas for reputation gaming
* Deleted questions are very low in quality and are pretty much unrevivable with interference, unlike closed questions. Pyramidal structure of decreasing quality - Normal -> Closed -> Deleted
* If your question is accidentally deleted, such ones are revived quickly
Some side notes
* Deleted questions are clearly against guidelines and the style of writing is enough to give away these questions are just poor even without the actual content.
* Most closed questions are relatively good in content quality but against site guidelines (off topic, subjective etc.)
Personally, I see more often than not that people are just annoyed they can't ask their question on Stackoverflow rather than accepting that SO isn't the right place to ask their question. In addition, I also see answers/comments very hostile and don't lead to constructive feedback. A typical example of this behavior is Person P asks Question Q. An expert E makes a comment "Why are you doing this? You shouldn't do this - this is not the right away". Such a comment is not helpful because it passes a judgment on the approach of the question rather than answering it even if the question approach was not correct.
[0] https://arxiv.org/abs/1307.7291
[1] https://arxiv.org/abs/1401.0480