Well, I don't really have one of the "big boy" knives like y'all.
I've just got a couple of the standard Swiss Army Knives, but that's about it. I've got the little tiny thin one on my key chain - the one with just a small blade, scissors, nail file/screwdriver, toothpick and tweezers. Comes in quite handy. Problem is, it gets confiscated almost everywhere I go now. Clubs, stadiums, airport - basically anywhere with a metal detector. They always confiscate it, and I've got to go buy another one for $10 or so (they never give it back). Think I'd learn and take it off beforehand, huh? Well think again...
I also have the mother of all Swiss Army Knives, and what's cool about it, is that we actually bought it IN Switzerland on our European vacation. It's the biggest model with the absolute most gadgets that they had available when we bought it around 1990 - about 64 "thingees" in all if I recall. I take it with me whenever I go traveling, hiking, outdoors, etc. Fun stuff! I can burn ants with the magnifying glass, saw a tree branch with the saw, scale a fish, fix the screw in someone's glasses, etc, etc...
But I'm certainly a far cry from the rest of you crazy Rambo wannabes!!