Joker

Because Jayce is a monster and honestly... pretty stright forward for a form change champ imo. That and apparently he's super busted right now due to that change they made. I forget what it was but it opened up his early build paths so he can build a lot more items other than the very slow Tear start he used to do.

another point could be maybe he just clicks with you. I've had champions I'm just much better at the second I start playing them than others. ((for exameple Aurelion Sol for me was just intuitive to the point some friends of mine say he's my main. He's not my main. He's not cause I don't do the main thing but yea lel.))