I've got a little Gerber that if I have a knife on me, it's that one. Also have a variety of Morakniv's, many in sheaths that I use in the shop, and yard. Nothing if I lose it, will I lay awake at night thinking about where was I when....
I also have a scattering of Opneil's back in the shop. I like that twister to keep them open. Nothing worse than a knife folding closed on your fangers. Plus they are pretty easy to sharpen, hardly will hold an edge, but easy to sharpen.