GradeAUnderA https://www.youtube.com/channel/UCz7iJPVTBGX6DNO1RNI2Fcg
GradeAUnderA doesn't count. His channel on Youtube is not gaming related.
For the most part with Youtube, I can't say that I have a 100% favorite channel where I can just go watch all the videos. If the subject matter doesn't interest me, then the Youtuber's personality and voice need to make up for that. Those types of people I can watch a video and become interested by what they are covering. Channels like that, for me, are in the far minority on Youtube for me. Same goes for Twitch. It is only a couple of streamers that I can watch anything that they are playing.
For example, Cinemassacre I only like to watch the AVGN videos or the ones where James is candid like the movie room tour or making of videos. The Board James or Mike plays whatever are not interesting to me. LazyGameReviews I can say his channel is in the 80% range. Game Chasers I only like the actual episodes. Sega-16, just Melf's pickup videos. The other channels where I pick and choose are ones that I don't subscribe to. I watch enough video game videos on Youtube that it will suggest the other big channels enough on its own. Like CUPodcast, Pewdiepie, etc.
There are some other channels that I don't really even watch their videos at all or maybe have seen just a couple ever. Channels like JonTron, Metal Jesus Rocks, Markiplier, etc.