I've forgotten more knots than I could name. Literally have one, maybe two per purpose.
Figure 8 variations are my favorite. They're quick, self tightening, easy to untie, and immobile.
Otherwise;
Overhand, at least double.
Half hitch, usually double unless I'm hoisting.
Lark's head.
Square knot, with safeties.
Inline 8
Directional 8
Follow through 8
Bowline
Clove hitch, with safety.
Bowyer's hitch
Barrel knot
Turle knot
Improved clinch
Palomar
>>2086332I can't remember a knot unless I understand how it works, but once I can see the force that holds it together, I'll never forget it. Also lets me combine my small skillset to accomplish things that would otherwise require specialty knots.
Incidentally, I keep getting the bowyer's hitch wrong because I don't yet understand it.