I used to own some nice ones but seeing as it's illegal to even carry them here now I don't really bother anymore. My favorite pocket knife which I used for fishing, before it got confiscated from me many years ago, was just a 4 inch blade 100% steel lock knife. It looked awesome and was a sturdy piece of equipment, bottom 1 inch of the blade was serrated, made easy to cut certain things that a smooth blade might have trouble with. There is something pleasing about a knife that looks awesome and is actually practically useful.
I still have a flick knife which is just about 5 inch blade but it's quite nice, I also have a big lock knife, doesn't look pretty and it's old but it's got an 8 inch blade, it's got a pretty bulky and heavy handle and the butt of the handle is a solid metal lump designed for smashed heads, it's nice to hold in the hand as it has some weight, I guess it would be my weapon of choice if anyone broke into my home.