Crappiest knife I've gotten in the last few years, a Fury lockback. But since someone gave it to me, I can't say it's my least favorite.
No, my least favorite would have to be one I paid for myself and was expecting something entirely different from what arrived. The Camillus/Timberline Pilot Survival Knife, a.k.a. "cheap Specwar lookalike".
I own several of the knives mentioned above, and am suprised to see them on the list. The K.I.S.S. for instance, seems like an OK knife, well-made and interesting design, especially for the money. BuckLite? I love mine, and carried one for a month-long desert survival program - it performed very well.
I don't own one, but I'm suprised to see the CRKY M16 mentioned so many times. Those are often recommended on the forums, if I'm not mistaken.
-Bob