Also I tend to do the "Don't recommend -> I don't like this video" for those that have the thumbnails with "that face" (you know, the YouTube Thumbnail Clickbait Face, I don't even know if there's an actual term for it).
When I actually enter a video, you have my attention by default and you'll get an instant dislike for:
- "Don't forget to like and subscribe."
- Showing those like and/or subscribe buttons on screen.
- If I get suspicious that you're padding video length, talking just for the sake of stalling.
"The Machine Fired Me" would not get me to block the channel but I've blocked hundreds of channels.
I also block any channel that appears to be a rando repeating the latest hot topic.