Well, you have had an assortment of knives, so you have to have a feel by now of what you like and don't like. For me, I think that's part of the process. I have been carrying knives for about 55+ years now, and still... no perfect knife. I prefer folders unless I am hunting and doing extensive camping.
I am in construction and carry a larger folder every day, usually one with the blade anywhere from about 3 1/4" to 4" in length. They all have clips on them, and none of them over the last decades have come open once I started to carry them tip up with the blades against the seam of my pants. I climb ladders, crawl on the floor to install trims, climb on roofs, and have a very active day. No problems. Likewise, with a QUALITY (can't reinforce that word enough) knife, I have never had a liner lock fail. No safe queens for me, they all go to work. Now granted, I don't use them as hard as some of the folks here when I am on the job site. I don't baton with my folders, I don't hammer them different objects, I don't stab metal, etc. They are used to cut, scrape, light prying, and anything I think isn't abuse.
That being said, over the last half century I have found there is no perfect knife for me. I remember when I got the RAT 1 when they were first introduced and hard to find. Couldn't get it out of my pocket. Then I got a Kershaw Tremor, not the RAT wound up in rotation. Then I got a Spyderco Valloton. Then I got a Cold Steel Amercan Lawman. Then a Utilitac II. After that, a ZT 0909. Like that one enough I bought an extra.
For me, it's a love affair with cutlery. To the point where I carry two knives all the time when at work, one for rough work and a smaller traditional to cut my cigars, pick out splinters, and any light slicing as needed.
I hope I never find the perfect knife. I actually went about 15 years without buying a new knife as there wasn't anything I was interested in. It was QUALITY (there's that word again) liner locks with pocket clips that got me interested again as I could more comfortably carry a larger work knife without a belt sheath. I am glad it rekindled my interest. I have more knives than I can use, but I love rotating them around. Once in a while I will drop an knife in my pocket and it's like running into an old girlfriend that you like seeing... fun all over again.
Robert