Vic Spartan made the biggest impression. It was my first pocket knife and made me aware of just how useful carrying one was.
After that would be the Kershaw Blur. It was the one that bridged the gap between utility and fun for me with regards to knives. The Blur is responsible for my having amassed more knives for dozens of lifetimes. So maybe it should be classified as a "good impression" but "bad influence".
Some runner-ups are the Spyderco Delica4 FFG (renewed appreciation of a well-made back lock, and a plastic/FRN handled knife that didn't feel "cheap"), Kershaw Leek (super-slim knife and very discrete carry), Benchmade Mini-Griptilian (Axis lock), and ZT 0301 (the beast!).
After that would be the Kershaw Blur. It was the one that bridged the gap between utility and fun for me with regards to knives. The Blur is responsible for my having amassed more knives for dozens of lifetimes. So maybe it should be classified as a "good impression" but "bad influence".

Some runner-ups are the Spyderco Delica4 FFG (renewed appreciation of a well-made back lock, and a plastic/FRN handled knife that didn't feel "cheap"), Kershaw Leek (super-slim knife and very discrete carry), Benchmade Mini-Griptilian (Axis lock), and ZT 0301 (the beast!).