Are you asking about liner locks (which have a scale over the lockbar) or framelocks (where the lockbar is exposed)?
Liner locks like the Military require no adjustment for me. I don't even notice the liner/lockbar until it is time to close the knife.
Framelocks require an adjustment I am not willing to make. I have half a dozen, and I won't carry any of them. I just don't care much for metal handles, and exposed locks bug me too.