For the last few years I have been slowly building a collection of knives. Most of them are pretty generic but I also have a few which I use a lot and that I really like having. I actually started my collection with a bayonet and a dagger, but both of these are now permanently lost (I have a $50 bounty on them for anyone who can retrieve these, more details below).
To start, I have numerous folding knives, but most of them are pretty generic. I do have several that I love though, including a black Spyderco Delica, a yellow Spyderco Dragonfly H1 Serrated, and a Twin Suns Planetary knife. The Twin Suns knife isn't very functional but I thought it looked sick and so I mostly just have it as a display. I also recently joined the buy on Massdrop for the Spyderco Native Blue Box, so hopefully I get something nice there.
For fixed blades, I primarily use a CRKT Acquisition although I have a couple of others too. I used to have a Romanian AK bayonet and a German Korium Solingen Claw dagger that I sent into the Sharpening Shack to get refinished since the years had taken their toll on them. The Sharpening Shack has been emailing me for the last year that they will send them back to me "soon" and they keep magically never showing up. I'll give anyone who lives near Chula Vista, CA a bounty of $50 if you can go to their location and retrieve them for me.