Keep it stock, or make it your own?

I do what I want, when I want, to all of my cars. But really, I’m too busy driving them most of the time to take them off the road for big changes. Just had this conversation yesterday as I’m selling my GTX, the guy asked what’s been changed on it, and in the 25 years I’ve owned it, honestly, not much. It’s too easy to just get in and beat the hell out of it and fix what breaks, if anything!