I generally carry two; a Vicky Swiss Army Knife (Cadet, I think) and a Benchmade Axis Lock (either the Osborne 941 or AFCK), plus another lockblade SAK or a Leatherman in my bookbag/backpack. IMHO, Benchmade makes the finest production folders bar none.
When I’m out on the trail, I freak out the Sierra Club contingent by carrying either a BK&T patrol machete or a Griffin M-85 (kabar-type utility knife) strapped on the side of my pack. I’ve had to cut my through some “maintained” trails on a few occasions, so it’s worth the weight to me. Plus, it’s a lot easier to prepare kindling (if I’m in a fire-permitted campsite, of course) with a big knife than a pocket folder, and is serves as a last ditch defense against the rare chance of wildlife attack.
Having studied edge weapon combat (briefly), I feel compelled to point out that a knife is a miserable weapon for self-defense. It has all the negatives of a firearm–inherent lethality, no non-penetrative application, bizarre mishmash of state and local regulations dictating where, when, and how you can wear and use it–with the added downsides of a lack of stopping potential and close-range use. For sentry removal it’s a different story, but personally I don’t have much call for that in my daily activities.
If I suspected I were going to be attacked, I’d much prefer to carry an ASP telescopic baton, a 4-5 C-cell Mag-Lite type flashlight, or a cane. With any one of these, I stand a good chance of knocking an attacker down or out. With a knife, it’s more likely I’m just going to make a bloody mess, and while evicerating him might well be a mortal wound, it may not prevent him from returning the favor. My instructor used to say that in a real knife fight, “One goes to the morgue, and the other to the ER”, and he had the scars on his arms and face to prove it.
Something is better than nothing, I suppose, but don’t have too much confidence in a sub-4" knife warding off a determined attacker.
Stranger