I just play solo race mode even though I started a career, which I haven't dipped back in to in ages. Like you, I avoid online. This game is just perfect for choosing a track, a car, boosting AI grid size to the max (or not sometimes), and going out and racing then enjoying the replay afterwards. It completely meets my needs for these things, custom championship would have been absolutely awesome though. PCars nailed the experience I was after. I wasn't wanting a forza or gt "game" of progression and unlocks, just the ability to interact with the game as I choose, with everything accessible from the start, much like many of the PC sims.