For me, it has to be this one, the 50mm ƒ1.4 lens that I originally got with my F2.
Aside from the 18-55mm “kit lens” that came with my D3200, the only other lenses I have to use with it are this 50mm, a 28mm ƒ3.5 Nikkor, and an 85-205mm ƒ3.8 Vivitar zoom lens, all about equally ancient (c...