Typically rocking an Emerson of one iteration or another but, for the knives I use the most, the BM Adamas, CS American Lawman, CS Recon or Spyderco Pacific Salt (in one iteration or another) seem to carry the gaff most of the time depending upon garb, environs and anticipated activities. Note, I more often than not have two folders on me.
The foregoing does not include the ubiquitous SAK and/or LM multi-tool.