I regrind them, cut some of the spine hump of so it's straighter like a Military, cut the sharp corner off the thumb ramp so it's actually comfortable and not a hot spot, then crown it and the spine to dial comfort to 11. And for the past year and a half or so, since I learned how to do it, I also add serrations, but not SpyderEdge style that has two small and really hard to sharpen scallops for every moderate scallop, but all relatively large scallops with nice pointy teeth that can both puncture and slice.
Here is a Tenacious and two Resiliences in S35VN I modded. Old pic. The Resilitary has left the building, but I still have the other two.
But here are the knives I currently carry, one at home, and one in town and at the shop, along with a Millie, Millie 2, and PM2 I also modded.
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Way more comfortable like this:
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