My wife is not very fanat.., er, she's not picky.  She EDCs a Leatherman Micra for use around PHRASECENSOREDPOSTERSHOULDKNOWBETTER. and a Victorinox Rucksack in her pack (gave up purses at the 2nd or 3rd kid).  If we go out for more than a weekend, I usually loan her a larger blade - an old good Solingen copy of a famous old design.  Sometimes she used to sneak my old Gerber Bird & Trout, too, but I think I've tempted her away with one of those nifty "Army" Mora knives - the plastic handled, plastic sheathed $9 one from Major.
Oh, she also has a tiny lockback clipped to her BSA hotspark, as do I.  Dunno that she uses it as a knife very often, though.
I've found that with her that knives are such utilitarian things that she's not interested as long as she has a sharp knife that gets the job done, and I really can't find any fault with that.  She doesn't like to be without a sharp, but that's about it.  Uh - I just thought of something - she DOES have a very strong preference for stainless steel.  It's a kitchen preference carried into EDC and backpacking; she's positive about that.  Hmmm.  That gives me an idea...