This is a difficult one, who had a chance to interact with all the shortlisted ?....
Since it is highly biased, I would just share my experience.
I voted MYSTERIO , I had first exchanges with him over on RepGeek especially following issues I had with some Trolls, he banned me, I was kind of pissed against him, I then was more active here, He showed a lot of courtesy, replying to many of my questions and post in the PAMs section.
I got to appreciate his inputs and insights.
I guess one should not judge someone by his first encounter.
he deserves my vote as a real gentleman and asset for this community