Once the knife laws were all repealed, I'd continue to carry what I do now (Gunting most days, Dodo for light days, plus a small utility folder, and the occasional small fixed blade). The only difference would be that I would no longer have to carry the fixed blade "unconcealed" so it might move from the front of my belt to behind my hip, or I might have some shoulder harnesses made. Knife size probably wouldn't increase (blade lengths are largely un-restricted in CA). Double edges are legal in CA, so I probably wouldn't get any more daggers - it's not my favorite blade shape although it looks nice. I've avoided balisongs because they're illegal in public in CA, so I might get a BM and try some flipping. I've avoided autos mostly because their mechanical complexity seems unjustified on something that should be extremely simple, but I might get a nice OTF to play with.
All in all, not a lot of changes. Knowledgeable knife users would probably carry pretty much what they already do, but sales of autos and balisongs would probably skyrocket as Joe Everybody stocked up.