I carry a Wenger Swiss Army Knife daily. When I'm hiking/camping/fishing I also carry a Buck 119 Special and a Gerber Gator belt hatchet.
I carried a Barlow all month as part of challenge over on the Blade Forum. I also have a SAK and a Stockman on me along with a Lockback.
You carry four knives?
That's hardcore
What is your knife of choice?