Leatherman Wave. Wore it out after years of use...
Now have a Charge. Love it.
No regrets on those at all...
On the other hand, every EDC 4 inch folder I've had I eventually fell out of love with after the initial whirlwind romance...
Kershaw G10/ATS34 developed too much bladeplay...
Spyderco Military (great blade!) had no protection against your hand sliding forward on a thrust... and the lock was too exposed. But for pure utility and never a fighter, that's a great knife.
AFCK... I got the combo edge... and realized later that I hate combo-edges... and the hollow ground doesn't shear through things well... Otherwise, a great handle and lock and blade shape.
Cuda Max.... that dagger style handle is not the most comfortable and it scares the sheeple when I'm cuttin' up an apple at work... but its got the best blade on any folder... 5.5 inch flat ground bowie with no recurve.
Skirmish... great handle, great lock, great steel, great build quality... but not real pointy. Not a good penetrator. Not good for shearing, only slicing. With a little regrinding at the point, its a perfect defense tool. And one of the best factory knives I've seen. The Hummer of pocketknives... solid as a rock.
Wegner Pro hunter. Really a great knife... just kind of... small. If they made one that was 4.5 inch blade, it would be a real winner.
LoneWolf T2. Except for some quality control issues, I thought I found my "final" knive. That's the sharpest knife I've ever had. Great SV-30 blade. Shears like a lightsaber (I assume

) penetrates wonderfully. So close to perfect... till the other day when I used pumpkin carving with the kids to test a few knives and found just how easily your hand slips up the handle toward the blade. Kind of like the Military... great utility knife... poor for defense where you may thrust and meet some resistance... by the way, the AFCK completely dominated the "stab the big bad pumpkin test," which will be no surprise to lots of people...
So...
I get to buy a new one! Whoopee! I'm looking around for a large (4 inch, or so, minimum) flat grind folder right now. Not sure what to get, 4 inch Aftermath is looking tasty, but an Al Mar Shrike might find its way into my hands as the search is still being conducted.... flat grind, micarta handle... I got seduced by the photos...
damn, steel addiction is a monkey that just won't get off your back...