Ten knives everyone should own? We've probably been over this question before here in Genpop, but as a thought exercise, it's always fun. I'll approach this list from the viewpoint of how I respond whenever I am recommending knives to non-knife-person friends lately:
1. "I want a knife" A SAK of some kind, and I'll usually recommend an ALOX model as these are a bit more durable, and colors are always fun. Of course, I've got plenty of the old red cellidor models kicking around here and there as well.
2. "I want a knife, but I'm really abusive, and might lose it." Get a bag full of cheap Moras or Opinels and call it a day.
3. "I got like $40 to get this done, and want a decent knife I'll take care of." Try to find a RAT I in D2, those are always decent knives you won't feel too bad if you lose it. Don't like it? Uhhhh...I'm told Kershaw, SOG, and CRKT make knives in that range, and I wish you all the best!
4. "I've got $100 to get this done, and want a decent knife I'll take care of." Spyderco Delica or Endura, Benchmade Bugout or Mini-Griptilian, or even a Cold Steel Voyager.
5. "I like using stuff my Dad/Granddad used, are those still around?" Yep, I've recommended a Buck 110, or an old Gerber model like the 90's Gators. I also have recommended Case knives (since GECs stopped being obtainable) if they want to go the smaller slipjoint route. The Bucks and Gerbers are hand-filling knives, and in the Buck's case, attainable at any big box store.
6. "I want something indestructable." Cold Steel. Simple as that. Pick a model. Recon 1, Ultimate Hunter, Code4, and so on. I used to recommend the UH and the Lawman directly, until the Lawman became unobtainable. These days I recommend an AD10 or AD15.
7. "I want a nice higher end production knife and am willing to spend a couple hundred dollars." Spyderco PM2 in a steel they enjoy, or a ZT are my two usual go-tos. I usually end up recommending they pick up an older ZT model like a 350 or 560, or even a 562 over any of the newer models, however.
8. "I want a fixed blade that I can take camping!" These days, I'll usually recommend something from TOPS (like the BOB) or from ESEE (usually the Esee 4), since those are pretty attainable. Hell, you can get an ESEE from Ace Hardware these days. At a pinch, a Buck 119 would fit the bill. I know, I know what you're thinking "What about CPK, a custom maker, or some other high speed knife/company?" I tend not to tell non-knife folks about knives that I know they won't bother to take the steps to try to obtain. If you have to go online, join a forum or get on an email list to try to get one, they're almost certainly not doing it. They'll be down at Wawwww-Mar' getting a Bear Grylls fixed blade, or that cheap Winchester $25 "booooo-eh knahf".
9. "I want a really high end knife that I can buy online from a dealer right now and have it sent to my house. Needs to be able to be a good EDC, as well as "going out" knife and I don't want to spend more than $600" Got it, CRK Sebenza, an Olamic Whippersnapper or Wayfarer 247, a few others. Frankly, there are a ton of choices in this arena and it's very much personal preference. I usually send 'em to a dealer's site armed with some of the big names, CRK, Hinder, etc.
10. "I need a multitool" Leatherman. I mean, of course. My recommendations would a Wave or Surge, although there are plenty of others these days!