I have a mini commander, a desert roadhouse and a socfkb. Each one was purchased for its own reason/usage.
What would I purchase next? Who knows. I have about worn myself out trying to figure that one out the last few months. If I came across a left handed model, that would add to the dilemma.
On top of that, I was at the Alamo last week while on vacation and a buddy commented that a photo of a 13 with the Alamo in the background would have been nice... If some of the new knives that were designed earlier this year went into production, I could see myself having to add more options to the list...
I know this doesn't answer your question, but once you get your daily carry knive(s) figured out, my feeling is everything else is just adding to a collection or filling a want... And yes, I have several wants...
YMMV.
My $0.02.
Fred