I guess I'll take a stab at this. I'm thinking I'll also go for a bit more breadth as far as flavors of sharp stuff goes. In no particular order. 1. A good all-round kitchen knife. I mean the good stuff, nice handles, good blade steel. Anything from say a simple Kanehide Gyuto to something as extravagant as a Towner Cutler Chef's in Damasteel. 2. A folder 3.25" or larger (max blade 4"). This will probably fit the bill for most EDC use. Super broad range here, obviously. 3. A sub 3" folder (min blade 2.5"). So one can learn from experience that a larger knife is better. Nah, I kid, sometimes a smaller blade carries better and is pretty much all you'll need for the day. 4. A scandi blade. Mora would be good choice to see if one likes this style of grind (way better for bushcrafty stuff, IMO). 5. Something with micarta. I prefer canvas but I think it's a good material that everyone should at least experience once; buffed or blasted texturing, doesn't matter. It's a fantastic handle material regardless of how it's finished. 6. A multitool. I'd go with a Leatherman-style multitool over a SAK-style. Though, each have their own pros/cons. Outdoor, Leatherman-style, you'd be surprise how useful a small saw can be. EDC/city, yea, SAK-style, smaller, easier to carry, a bit more classy to carry, more useful tools for daily tasks. 7. A traditional. Be it a Buck 110, a Case Sodbuster, or even a Higonokami. I'd say modern traditionals could fit in this category, as well, even customs. 8. A friggin' cheap beater fixed blade. I'd say cheap would be around 100 bucks or so. BK&T BK7 would be pretty good choice, mine's a Condor Hudson Bay. 9. A quality fixed blade. Anything from BRKT to LT Wright to CPK. You know it when you see it. 10. A true custom. One that you design, pick materials, lock type, etc. Pretty much short of making the darn thing yourself.