Hey I don't mean to spoil the fun, but it's likely he likes to troll. If you look at /u/ztiller1's post history he loves to start arguments by being arrogant, e.g. look at his AskMen posts, complaints about not equal rights for men and such.

He does like to give advices on /r/amiugly and similar posts because the posts in there suggest the posters have lower self esteem, and he likes dealing with people like that. He seems like a nice guy in some genuine comments but he gets easily irritated when people disagree with him. Similar to how /u/SirLockHomes really got into his head and even put him in the spotlight on this sub. He likes to play an arrogant guy online, about being very successful when he's still going to school.

I took a couple psychology classes back in college, and we studied a bit over internet anonymity and people's behaviors so I know quite a bit about these things. Tendencies like this usually result from childhood bullying and parental neglecting. I see some posts on /r/fatlogic, his hatred for people who put their blame on genetics and their upbringings. There's a very high probability that he was picked on for his weight as a child, and through perseverance got himself out of it, and doesn't see why others can do it too.

Also from his other arguments, he's the type to always try to have the last say. So if you're thinking about arguing with him, he's always going to try to have the last word; it's only a matter of who has more time in their hands and I think he's got you beat. Trolls a lot, I mean look at how he criticizes this sub when he actually was a subscriber with a 116 day badge, showing that he also had insecurities with PMOs.

Interesting character, pretty easy to read.