It is an esthetic thing for me: I have never warmed up to Spiderco knives just because of that big hole and hump. T^hey are as good as many other production knfe brands, I am sure. I was given one for Christmas this year, and it seems to be a good knife, though made in China like so many other brands are today. I just cannot look at any of their blades with the big hole and like the way it looks.
Ye4ars ago, I gave a Darrel Ralph designed, Camillus produced folding dagger as a gift. I really liked the flipper opening feature, and there is no hump or hole. I really liked that knife then and still do.
My EDC now is a Leatherman Wave in a horizontal belt pouch. The blade is big enough for city-boy daily needs, and I can open it with one hand if I need to.