At least for modern EDC folders:
- A thinner blade! I've passed on so many otherwise attractive EDC knives because the blades are 0.14" or thicker. In reality, anything more than 0.12" is unlikely to contribute anything helpful for my regular EDC needs but is likely to increase both weight and drag.
- A proper sharpening choil. I've had a bunch of knives with ostensible choils that don't clear the plunge. Why even bother? Either go without or do it right. I'll take an unusable finger choil over a misaligned sharpening choil any day.
- Good screws, T8 where possible, and no permanent thread-locker. People should be able to take their knives apart. I'm glad to see more companies using T8 body screws and not gluing their knives shut at the factory. I hope the trend advances.
- Recessed clip screws on deep carry clips. Seriously, why put speed bumps inside the loop if it can be avoided? Also...
- No clip recess on the show side. Yeah, I get that lefties need love and can technically operate right-handed frame and liner locks. However, having a little cut-out in the show side can both ruin the aesthetics for me and create hot spots at the rim. Some companies have taken to filling that spot with a steel plate but there are very few designs where I think that looks good. I'm okay with just the screw holes but a cut-out is probably a deal-breaker for me.
- Keep any lanyard attachment points hidden within a back spacer. Lanyard holes sometimes feel haphazard and are sometimes prioritized over clip placement. They sometimes involve recessing the scale for an exposed section of liner (this is one of my few complaints about the Elementum). Sometimes, they stick out and create a hot spot. If a lanyard hole is absolutely necessary, just use a protected pin within a back spacer.
- Blade totally protected when closed. Running your finger over the closed knife should present zero risk of getting poked or cut.
- Chamfer the edges and round the corners! Crisp edges don't feel good. Scale edges should not feel sharp. Since I'm not striking ferro rods with my EDC folder, I don't want a sharp spine either. If a Spydie or other opening hole is large enough to accept finger meat, I'd prefer that rim to be chamfered. I also don't want sharp corners creating unnecessary hot spots. Knives are tools and should feel good in hand during use!