Below are some of my favorite knives when it comes to Primary Defensive Folders. These are not for opening boxes or cleaning your nails but rather for SD if by choice, regulation, or law you carry folder. Even though many people go on an on about how if you are going to a knife fight you want a fixed blade, the truth is about 75% of us carry a folder every day. Gotta dance with who brought ya.
Left to right
Benchmade Skirmish (this one is customized)
Emerson CQC8 modded to tip down carry, excellent blade shape for SD
Benchmade Deja Voo
Benchmade AFCK (pre AXIS lock)
Spyderco Chinook GEN I (GEN II has more of a Persian blade profile)
Al Mar Payara