I enjoy watching a lot of markiplier. I could go to anyone to watch a whole play through of a game he'd done. But I enjoy watching it because of Markiplier..
You don't watch it just because of the game you watch it for the enjoyment of enjoying it with someone else. You also may enjoy someone's personality who is playing it.
Let's be real watching a quiet stream can sometimes be a bit boring but add someone who talks and makes silly comments, reacts, and stuff it than becomes a more better experience.
This has to be the main video that got me to watch brofresco... made me laugh as he's like "Riot.. what .. have.. you.. done.. to... My favorite... champion... this mobility..."
and I'm just giggling..
https://www.youtube.com/watch?v=HVmn8yz1evU
as far as streams go, they can be fun if the streamer always has something to watch and is constantly engaged with people in the chat section like replying to people.. that's the sign of a good streamer, they're engaged and engaging and if you enjoy their personality.. the better it is..