Might as well draw all of my headcanons before episode 6 comes out.
If/when(?) Tahno loses his bending, I think it would be a giant reality check for him. He’d grow into a better person, stop acting so high and mighty, and focus on important things other than his image and bending. He’d cut his hair. :p And if my dreams were to come true, which they probably won’t, he’d join Korra’s team and be helpful.