Ya I homebrew every game I play because I think it's fun. I like designing things, I like game design, and it's easier to do when you have an existing chassis. Plus I bet that numbers first, balanced games can actually make this easier.

I thought 5E was the easiest game to homebrew because classes have such few features and everything is so loosey goosey, but if you do it with a more well balanced game, you probably have an easier time finding the right numbers to use to plug into everything, because there are predictable formulas and such.

At least, that's what I think, I've still done it with 5e more than anything else, but I'd like to try with Pathfinder 2E or DnD 4e.