I main J4. I like how his kit is simple but there is a lot of skill expression with different ways to use his abilities. I also would argue that he is the most versatile champ in the game being viable in 4 roles with builds ranging from full tank to full ad to ap support. I have never really gotten board of playing him as there is always something to try. I strongly recommend people try a few different builds with him rather than only ever running Goredrinker bruiser every game