Opinel knives have been in my pocket since the mid 90's at first as a young Chef mostly because because as a boy I saw Jacques Pépin forage for wild mushrooms in my folks backyard with one. My #8 was my kitchen utility knife used for things I would not want to use my good kitchen knives for, It accompanied me on many camping trips, for food prep, fire building, camp craft, etc. Then when I decided on a career change the Opinel followed me, my # 8 was soon retired and replaced with a #9 which has trimmed a little off baseboards here and there, scored sheetrock, cement board, cut shims, notched strapping, scraped off dried mortar from bricks, cut miles of fiberglass insulation and closed cell insulation, it had scraped PVC, used as a scribe, helped me seat duct work, and has even made penetration holes in 26g and 30g sheet metal fittings to get tin snips in and many other mundane task. It has been sharpened on rocks, cinder blocks, foundations, car windows, files, sandpaper, whatever was around to help keep it sharp during the work day. I would be hard pressed to find another knife that has stayed in perfect working condition after all the work and use, borderline abuse I've put this knife through. I've tried #8-#10, I find the #8 a little small for what I was doing, the #10 is a great camp knife, a little big for day to day pocket carry, I found the #9 to be my sweet spot. My original #8 is a sliver of what it once was, my #9 is not that far behind, a few years ago my wife bought me a new #9 with my initial engraved, it's what I call my "nice" Opinel, but I have not bonded with it like my other #9.
My original #8
My #9 not a mod, more of a evolution, the blade is almost completely obscured by the handle so I had to make a easy open so I could get to the blade.
Two #9 side by side old & newer
The engraved #9
Group shoot top to bottom carbon #10, engraved #9, my workhorse #9, my original #8, and a Inox #8
Pete