I almost always carry a Leatherman Wave. I love that thing!
The knife collection keeps growing, but the ones I find myself carrying/using most often:
Leatherman Micra on the keychain
Spyderco Endura plain edge,
Emerson CQC7B
USMC KBar.
Cold Steel Safe Keeper III
Surprisingly, I find myself preferring the Spyderco rather than the Emerson. The thumbhole is more comfortable and ergonomic to me and I've had problems with the tension on the main screw of the CQC7, namely the screw loosening up and the damn blade punching through my pants. @%&#$&!!! Locktite solved the loosening problem, but now the knife doesn't open very smoothly. Has anyone else had this problem? I'm not a big fan of the liner lock on it, either.
The Benchmade 806D2 AFCK AXIS or 721 Mel Pardue looks like my next folder.
Tom