I don't think we need this kind of thing. If we're to give a title, then it's better if the title is funny, silly and doesn't really have a meaning. For example, giving me the title "Witcher".
Giving a title with a certain criteria like...
...this will create some problem later on.
1. It will just make it feels like we're helping people because of the title and not because we really wanted too.
And the title itself sounds like some sort of duty. People help because they wanted too, not because it was an obligation.
2. What about people who doesn't have a specific title? Will they contribute and helping people even without the title "Helpful"?
Or will they just let the people with "Helpful' or "Constructive" title to do the work?
3. And what about the people who is both friendly AND creative? Do they gonna have both title?
For me, I don't think we need this kind of title thingy. And that's my opinion in this matter.
That is all.