I keep my blades sharp, but it's not about safety, really; it must have been 5+ years since I've cut myself the last time, so that's a non-issue. A knife is simply more useful when it's sharp; sharpness, in fact, is what makes knife a knife in the first place (note that sharpness and sharpening angle are two different things).

Usually I carry my Victorinox with me, it has pretty much everything I (might) need: knife, saw, tweezers, can-opener and a few screwdrivers, toothpick and a spike/drill/nail for general MacGyverisms. It's also a survival tool I keep in my pocket along with a few selected items instead of in my pack with other stuff.

When I know I'll need to work with wood, I usually bring a proper knife like my Roselli Carpenter Knife (the best general-purpose puukko I've ever used) or Sissipuukko (if I really need to cut down some trees <img src="/forums/images/graemlins/wink.gif" alt="" />).

By the way, what do people actually use scissors for? The only time I ever miss them is when I need to cut my nails, and that can be done with a sharp knife, too - though it can be a bit difficult with broken nails at times. But things like cutting cord or opening a bag of freeze-dried food is, in my opinion, quicker and easier with a knife. No, I'm not trying to say knifes are better than scissors, I'm just wondering if others are using their scissors for things I haven't thought of.