Benchmade. Anything with an Axis lock. I've been carrying mine for years and it's by far the easiest one-handed opening/closing knife with a bomb-proof lock that will take and then hold a working edge for ever! The only times I don't carry it is when I will be traveling in Third World countries. Then I go for Spyderco. (I wouldn't feel too bad losing a Spyderco. I'd be heartbroken losing my Benchmades.)
Stitchawl
Stitchawl