I watch Gopher... shamefully, almost like a religion. The man could narrate the back of a frozen pizza box and I'd listen to him.
I watch Scott Manley similarly. Less because of his amazing narration or anything, though, and more just the man is almost always talking about something genuinely interesting. Sometimes even educational.
I watch Markiplier, Jesse Cox, or Jacksepticeye when they do a Let's Play that I want to see but don't want to buy/play myself, for whatever reason. Primarily horror games, which I just don't have the nervous system to play myself. They're a little too excitable and zaney for my tastes, but they're better than most other options I've found. They all seem like reasonably nice folks, too, rather than raging assholes or drama queens or living trainwrecks.
Before they were cool, I watched Research Indicate's Tresspasser series, which I still say is probably the single greatest Let's Play of all time.