On the subject of fanfics, I can't wait for the Iron Will fanfics, I hope someone does a background story for him, because I have a great idea of making him into an ex-pro wrestler for some reason.
One thing I like about the episode is that at the end, he was actually very reasonable. He wasn't a monster, he was just teaching others wrong.
My personal fanon for him is that he was actually bullied a lot growing up, and had to teach himself how to handle it, since no one else would help him. And then he saw others being bullied, so he taught them to do the same.
When he was met with non-violent resistance for the first time in the form of Fluttershy, it surprised him and essentially changed his viewpoint on things.
I suppose he could've been a pro-wrestler along the lines. He certainly acts like one XD
In case you can't tell, I like Iron Will. He's sorta like Gilda's opposite.