WOOT! A subject near and dear to my heart - I love knives as much as I love firearms.
My most recent acquisition is the Walther P99 lockblade knife which I like very much, even though it's way too large to be an EDC knife. It's now on the belt I wear when camping, along with my survival kit, canteen, Leatherman Wave and two other knives.
I've done a full review on it here
but in brief: one hand opening, liner lock, good grips (with interchangeable back straps like the pistol on which it's patterned), belt pouch and it's black (so it's perfect
While on camping knives, I've got a "Rich A. Herder" high-carbon steel sheath knife that was made in Solingen, Germany (made from the original dies for the WWII HJ Messer but without the hilt insignia or blade inscription) which feels nice in the hand and holds an edge extremely well and another Solingen-made Bowie-style sheath knife of semi-stainless steel (which is to say, it's not completely stainless but it doesn't rust as fast as it could) that has an extremely heavy blade, which I carry instead of a tomahawk. I've long since worn off the brand name cleaning up the "stainless" surface.
My EDC knives are the two blades of my Leatherman Wave and two Victorinox Swiss Army knives - the "Spartan" and the "Classic SD". These are pretty much all I can get away with in an urban setting here in New Zealand as we're not allowed to carry knives without "a good reason to do so" - and it's not us that decides if our reason is "good" enough (that's left up to the member of the Constabulary who finds it on your person to decide.)
But as a techie, I figure can pretty much get away with a couple of multi-purpose tools
that also happen to incorporate knife blades.
When I'm out camping or tramping or even out on a farm, having the larger knives on me is justifiable.
I'm planning on getting a Spyderco "Persistence" lockblade (liner lock again, as I don't like having the lock release in the middle, or at the end, of the grip) but I doubt I could come up with a "reason" for carrying that at any time other than when I'm out camping/hunting.
I've had to retire my old lock-blade knife - an Okapi copy of the Mercator "Cat" - as it's been too sadly abused over the years, the blade is so wobbly that if I tried to slice a potato I'd end up with crinkle-cut crisps. Kinda sad, as it was part of my camping gear/survival kit for over 20 years.