My EDC (wearing jeans, not at work) is a Swiss Army Camper, Leatherman Micra and a Kershaw Hype. If I am hiking or working outdoors the Kershaw is replaced with a Benchmade Barrage. If I am wearing slacks I might replace the Kershaw Hype with a Kershaw Leek.
I really like the assisted opening models for a main knife. So dang handy when I am working on things and need a quick blade opened surely. The barrage especially slams the blade open. I am not too keen on the liner lock of the Kershaws for heavy duty work. For everyday stuff it seems adequate. But for heavier work or out away form civilization and my life might depend on a knife for working in survival situation and not cut my fingers, then I like the Axis lock of the Benchmade. The assisted Axis lock and the automatic Benchmade (a friend was issued one when deployed) are very fast and lock up solid.
I really like the thin blade of the SAK knives in general for finer work. And after trying a few models I've decided the Camper is the ideal for me: medium size like the Tinker but has the wood/bone saw usually found on the larger knives like the Hunter. Also has a corkscrew which is actually one of the more frequent "does anyone have a ______ handy?" tools, especially at family outings. I like that Victorinox came out with larger models and locking blades and even the Spyderco style thumbhole opening. But in practice I would rather have a dedicated blade assisted opening knife, along with a medium size SAK, rather than one large SAK. I use the main blade for cutting food stuff (great for an apple, carrots, or cheese), the bottle opener, toothpick, and occasionally the can opener. The wood saw is a just-in-case tool for firemaking if stranded. Or field amputation!!!
The Micra I usually just use the nail file. Doing manual work tears up my nails and being able to file them down a bit when out and about is the best prevention to tearing them, or minimizing the damage already done.