I EDC because I can.
Most days, it's the Para2:
In a suit, it's a Vagnino custom:
In locations with limits on locks and blade length( elementary school, etc) it'll be a Swayback Jack:
I also normally have a Classic on my keychain, mostly for the scissors and tweezers.
I've carried a knife since I was 7. I stopped for a couple years after having 2 Classic's "confiscated" by the TSA.
One day, I had a box in my hand that needed breaking down. I didn't have a pen in my pocket, and my knuckles started cracking from punching at the tape to no avail. I walked to the garage, got out a utility knife, and took care of it. All the while, thinking, "I wonder if there's a folding knife I can open with one hand." I went online, bought a SOG, and found this place. No turning back now. And I carry one whenever I can.
I, too, think of it more as a Selection than a Collection. Tool for the job.
I use my knife every day. I eat a lot of salads, so often have to cut the chicken smaller or slice on some extra tomato. Open packages. Those doggone clampacks are killers. Cut strings. Snip suckers from trees. My mom needed to trim a toothpick so it would fit between her teeth.
Getting Christmas Trees one year, they provided twine, but no scissors or knife. Loaned mine to a total stranger, who was most grateful.
It feels good in the hand, makes quick work of separating whatever materials need it, and is just a really handy tool. Knowledge that it could, one day, prove even more useful during a critical situation just makes it that much more valuable, to me.