All of them are helpful in some ways. I don't have a fav at this time. What I have done is ignored youtubers who have 8 inches of sponsorship links, sell junk, have patreon or whatever that middleman service is with scrolling screens about sponsor me with big fat thumbs up icons either full time or every other minute, including stopping and giving a commercial 3 minutes in. If I want to watch 3 minute commercial's I don't need youtube to do it. I get that people like to make money and stuff and monetize their channels, and more power to them but that's why youtube does it, because youtube gets the majority share of income.
I try to watch those, but it gets to be too much for me. Everybody else's mileage will differ. I wish these people well, I'm positive little ol me not sponsoring them isn't going to break their channel.