I watched 2 or 3 episodes of "An American Family", which as far as I know was the very first reality show ever created, in 1971, on PBS. Why, would be because it was something new & different and I was curious.
Those were the last episodes of any reality show that I've ever watched. I have absolutely no interest in any such programming. Not that I object to them, at least some of them; I just have no interest.
Same goes for any & all "contest" shows; never watched one, don't care. Unless you want to count "The Gong Show", which I watched on occasion because it was sometimes hilarious.
Of course, I've seen ads & segments of others while sitting in front of or walking past a TV. Still, nothing.