Our "not constructive" close reasons is as follows:
This question does not meet enough of our six guidelines for constructive subjective questions. All questions should be practical, answerable, and of some educational value to the greater community. Chatty, open-ended discussion questions diminish the usefulness of our site and push other questions off the front page. See the FAQ.
The description on Stack Overflow is different:
This question is not a good fit to our Q&A format. We expect answers to generally involve facts, references, or specific expertise; this question will likely solicit opinion, debate, arguments, polling, or extended discussion. See the FAQ.
It seems to me that it is still quite applicable to the kinds of questions that get closed as "not constructive" on Programmers and it's more comprehensive and clear than the one we've got. Although at the same time it's important to mention the guidelines for good subjective questions.
We can ask the SE team to update our description if we think it's worth doing and can come up with a better wording. Do you think we should? Do you have any wording suggestions?