I don't have any problems with what you guys are saying, but as far as I'm concerned, it's hard to beat a small Cold Steel Voyager. Small, light, and they lock.
Back when all the decent bikes were 10-speeds, I just didn't ride bikes. But when mountain bikes appeared, I found I could ride in comfort, without my head staring at the road below me and my ass cranked high into the air. Oh, and let's not forget the skinny tires that required asphalt to ride! I could no more go back to slip joints than I could go back to 10-speeds. I'm sure there are guys and gals out there who love 'em, but I'm not one of them.
Same with slip joints. I don't like the way they snap open and snap shut. When I was a Boy Scout, I remember when my blade got embedded in a piece of wood I was whittling. I pulled it out of the wood and it immediately snapped shut on my fingers! I still remember my parents taking me to the doctor to get my hand fixed. The doctor told me it happened quite often and the knife was taken from me and my dad replaced it with some knife called "Case" or something. Pretty little thing. It had a snappy blade too. It's still in my jewelry box with my cuff links if you want to see it. Only when locking knives appeared did I begin to get interested again. My favorite knife is a 5-inch plain edge CS Voyager. Nice polished blade, serious uses, light weight, decent lock and nice springs as well. Nothing like a Buck 110 which can snap back and cut your arm off at the shoulder!