The first knife I actualy bought, was a Kershaw Chive with the SS handle. I was completely fascinated by the AO. I cycled that thing for hours. Think I replaced the Speed Safe torsion bar 2-3 times. I even got my nickname engraved on it. To this day it is still the only knife I own with Bobus X on it lol. The blade rubs the liners really bad now, so I don't carry it anymore, but I will never get rid of it.
My favorite Spyderco is without a doubt my UKPK Foliage Green g-10 Leaf Blade. Razor sharp, opens easy, legal even in the UK, great pocket clip, grippy but not pants shredding, safe slipjoint that is super easy to close, and hyper ergonomic handle. Only my recent Benchmade kick has knocked it out of my pocket, and I still carry it in my backpack almost everywhere I go. It will be a cold day in hell before I get rid of that one.