On Meta Stack Exchange, questions need to be tagged with at least 1 from discussion, bug, feature-request, or support. It would be nice to the user to select one of these tags when asking a question, just like in the web interface:
instead of giving an error message after he tries to post the question:
At least one of these tags is required - 'bug feature-request discussion support'.
(all the more so since the user can only try to post the question once every 60 seconds…)