I wouldn't consider myself to be a collector, but I do enjoy knives overall. I have a variety of different knives used for anything one could possibly imagine. One of my favorite blades is my K-Bar. They are typically known to be something that Marines carry with them on a regular basis, but I like the blade because it is so strong and durable. I also have a fondness of Spyderco knives. I own a number of these and even carry one on me at all times. These blades have the perfect set up for a self defense situation as the hole in the blade is perfect for opening the blade in a hurry, and in a situation that may not allow for fine motor skills. Spyderco would probably offer a variety of blades that would fit your gift giving needs, but you would have to look at what they offer.