Depends on the blade.
My Kershaw Skyline is carried when I'm working out/running, doing sports, in the outdoors, working, am in my backyard doing any kind of yard activity, etc. It gets used the most out of all of my knives and is most definitely my go to blade.
My Kershaw Leek is usually carried when I'm going somewhere to eat, shopping, or am dressed slightly nicer. I can count on one hand the times I've used it. I make a point not to use it if possible so the blade is always very sharp in-case I actually 'need' it. It's my 'nice' knife as it looks fairly elegant, so when I carry it I prefer to keep it 'nice'.
I have a mini SAK (You know, the keychain one) that I keep at my desk and its extremely useful for opening mail, boxes, etc. The little blade (which is probably only about 1.5 long) is razor sharp. The mini skissors are surprisingly useful (and are sharp) as well. Also I've occasionally used the mini tweezers for random tasks.
I have a multi tool also at my desk which seems some usage. If I'm going fishing, hunting, etc. the multi tool is likely to come with me. If I need a screwdriver around the house the multi tool is my first choice as I won't have to pull out my toolbox and start digging through it, etc.
Some days will go by and I'll use one of my knives, sometimes a week will go by before I need one. In my mind the point of an EDC knife is to always have one in-case you need it. Really I think every male should have one... I can't tell you how many times I've had people ask to borrow my knife. At my last job I used to carry two, one for myself, and one to let people borrow. Of course I always made sure they knew they'd better keep tabs on it and get it back to me after they finished... Seems like most people who don't carry a knife are so much more likely to lose or damage one from misuse (IE prying, using as a screwdriver with the sharp edge down, cutting down and baring the blade into metal/concrete, etc. It really is sad when you have to supervise a full grown man with your blade.
