The top two reasons have now been implemented. You can check them out in the flag dialogs!
We remember status-deferred over here: Custom close reasons for this site?
Sites have the ability to have up to 3 custom close reasons, when multiple instances of off-topic questions have been seen. Custom close reasons allow sites to send a more specific message to askers stating why their question is off-topic.
We've compiled some statistics to help us understand what questions get closed. Most of this information is provided with the moderator tools, and more information is available, and can be made pretty with graphs, using data taken from the Stack Exchange Data Explorer.
Here is some of the stats that we've found:
Within the last 90 days, we've seen 252 questions asked, of which 79 were closed (31% closed)
Close Reason | Number closed | % of closed | Number reopened | % reopened
-------------+---------------+-------------+-----------------+------------
Off-topic | 28 | 35.44 | 1 | 3.57
Unclear | 12 | 15.19 | 1 | 8.33
Too Broad | 20 | 25.32 | 5 | 25.00
Opinion | 5 | 6.33 | 2 | 40.00
Duplicate | 14 | 17.72 | 3 | 21.43
Anyways... That's just basic close data.
Many questions that have been closed are recommendations of some sort: software, hardware, website and license recommendations
- Most license recommendations are normally reopened.
So how do I propose a close reason?
Provide strong arguments
Anyone can propose one, but make sure that you present a strong argument for why it should exist. Provide us with multiple use cases where it could (and would've) been used.
Make sure that it is clear, concise and to the point:
Close reasons don't have to be overly verbose. Make sure that anyone can understand them. You can emphasize certain words, as markdown is also supported. Keep close reasons short, and provide a link with where you can direct users for more information. This brings us to our next point...
Provide additional resources
Make a meta post, Q&A style, that specifically explains why a particular question is closed. If a question is off-topic, explain why, and provide them to other sites where their question is accepted. Don't just redirect users, help then improve so that better quality questions can also be asked on the destination site. Once this is done, a moderator will come and provide the faq tag, and the close reason will be updated.
Critique others
Provide constructive feedback and criticism on other suggestions, and ways that they can be worded better. If people start up meta posts, then help out with those, and plan them in chat.
Have fun!