Personally, I enjoy watching people who are better than me play a game. One of my favorites is Insym, dude is just incredible at figuring out the mechanics behind gameplay and screwing around with the game engine. It's really interesting to watch him figure stuff out and test his theories in real time.

On the opposite end of the scale it can also be hilarious to watch someone like Jerma walk around talking about food while ignoring the most obvious things in the game. It's like a mobile ad that makes you want to play the game just to do it right.

There's plenty of trash content on twitch but there are definitely creators that make watching them play a lot more about their personality than the game itself.