Thoughts on Jax
I like trying to rework champions and Jax has caught my interest. The problem is, I don't play Jax. I know his abilities, but I don't know what he feels like. So, I'm going to deliver what I think of Jax and ask for feedback, either commentary or what Jax as a champion is to you.
For me, Jax is the master duelist, but not in the way Fiora is. Fiora is more stuck up about How I long for a worthy opponent. Jax is the master because he likes to fight. He's fought so long he's learned your moves, your neighbor's moves, your dogs moves, etc. And more than that, he's learned to adapt to new things as they come. And his styles blend. I'm reminded of Uncle Iroh for Avatar. The avatar isn't the strongest because he has 4 elements to bend, but because he has 4 styles he can incorporate into 4 elements; Iroh does a similar thing, but with one element. Jax is the league version of that. Bruce Lee said "I fear not the man who has practiced a thousand kicks once, but the man who has practiced one kick a thousand times." Well Jax has practiced a thousand kicks a thousand time. I'm also reminded of the summoner showdown video of him versus Fiora. He loses as a sword-staff fighter, but wins using a more judo-style technique and unconventional weapon that he's likely never used before.
Moving on, he's never lost his love of a good fight, which is why is specifically nerfs himself by using a lampost instead of a real weapon. It makes the fight, which would otherwise be onsided, somewhat interesting. It's also why, and this is something I might incorporate if I actually try to design a rework, he would be inclined to hold back. Until his opponent proves they can keep and he ults.
TL;DR: Jax likes to fight and will do what he can to make it interesting. Moreover, he's fought so much at this point that the styles and weapons blend together. He's using a lamppost because you'd already be dead if he weren't. By the time he's done, you'll be convinced a lamppost is a real weapon.