Only a few weeks have passed since I've become a citizen and less than 5-6 months that I've been serving as Content Staff (that position allowed me to set my user title for the first time) and I still remember my 'feelings' from doing that. Well, it's a little nice feature and a fine privilege to be able to edit your user title. Since it has been a feature restricted to citizens and content staff for all these years, I see no reason to just throw it to everyone else but we can set a minimum of requirements from a member to gain this ability. For example, the requirements could be to reach a certain amount of posts or reputation. I definitely believe that even such a little feature could raise interest for members to contribute a little bit to acquire it.