For me it is the
stockman. It's sort of something I stumbled into. I bought a Buck 703 Colt in 1989, then in the early 90s I found a Schrade 505SC (also a 1989 model) that someone lost at a trailhead in Idaho. A few years later I inherited my fathers 885UH Senior Rancher that I had given him after he lost the knife that he had carried for decades. (Fitting, since he gave me my first knife when I was four.) My interest in knives was pretty quiet for several years until a few weeks ago when I found this little 807UH "J.R." at a local shop, just had to have it, and took it home for $18. I think that put me "over the edge" and I've since acquired two Case medium stockmans (6318 and 6344).
Oh, I carried a Buck 110 for decades and I've tried those new-fangled pocket-clip things, but nothing does it for me like a traditional, and especially a stockman.
(Hope this picture comes through.)