I'm subscribed to some 120 channels. There are categories of things I like. But my top channel, the one I look forward to most (and there is some stiff competition) is SV Seeker.
Some categories:
Boat building: SV Seeker, Brupeg, Life on the hulls, Acorn to Arabella, Sampson, etc.
Automotive/small engine: Vice Grip Garage, Mustie1, Fuzzy Dice, etc.
Off Grid/homesteading: Red poppy ranch, wranglerstar, etc.
Electronics/retro: AVE, 8bit guy, Artifact electronics, etc
Music: Rick Beato and a few others.
Sailing: Zatara, SV delos, MJ sailing, etc.
3D Printing: CHEP,
And some that I can't categorize: Cody's Lab, Andrew Camarata, Blue Collar Logic
Newest sub is: Stuff Made Here. Newish channel, dude is super smart and makes badass robots and stuff.