I dislike this guy's videos for the same reason I stopped listening to Fro's processing stuff when he seemed to always "start with Skittles" (one of his preset looks) - both of them can't be right so that means both of them must be wrong, at least most of the time.
I don't use presets, but I have "a look" to my photos because I've been doing this a long time, I've tried all sorts of tools and methods, and I've whittled it down to a couple great noise reduction and sharpening tools, and Camera Raw (in LR and as a filter in PS). I use the Color Mixer module all the time, but I never go in with the idea that I need to apply certain fixed parameters - if I did I'd create a camera profile that did that and apply it on import. Post-processing is the modern darkroom, and we have a choice working like Ansel Adams, or Photomat. Not saying one is right and one is wrong, just that one will always leave you satisfied.
As for the YouTube guys, not everyone can teach, and not everyone can present enough personality to be both entertaining and likeable. I've made a tone of post-processing videos for friends and forums over the years, and I stand by the content, but would never think I could use them as the basis of a for-profit channel. At least not yet. LOL But I'm glad for the people who have taken the time to post what they think they've either discovered or perfected in Photoshop, because I've benefited from it even if I've long since forgotten what they taught.