I never worked professional on anything mass production automotive related, I think I would have enjoyed that. Seems like it could be quite challenging from the mass production perspective. If something gets missed during evaluation, not so easy to fix when there being pumped out like jelly beans. I mostly worked on lower volume quite expensive systems. Did do some higher volume smart meter design for power utility metering.
I dunno. Unless I badly missed my guess, you enjoyed racing hot cars. I did some racing before I started my automotive career. In fact, that's a big part of how I got the job. But my day job totally completely destroyed any interest I had in racing and hot cars on my own time. That business of turning your hobbies into a job is totally over-rated.
But ya, I did enjoy my job. It was also easy to find other interests to fill my time after work.