Lots of good responses. You really need to define your requirments in order to decide what is best. Pocket knife to me fits a pretty good range of folders. I prefer lockbacks and have had many including Buck, Kershaw, Coldsteel and others. The knives that i carry daily in various models depending on what i'm doing and wearing are Spyderco. My favorite is the Delica. Perfect for most things and still compact and very strong. I've been carrying it for well over 15years. I also have smaller models without clips for carrying in slacks pockets. Spyderco knives like many mentioned are not cheap but will serve you well for decades.

Good luck with whatever you decide.
OG03

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Shield 40&9, BG, P1345, G23/19