First, "Rotation" of a lot of knives is something I've avoided for some time now since I consider my EDC as a self defense implement as well as an edged tool. I truly believe that for SD you need to develop mind muscle memory to assure you can react under stress.
That said, here's what I carry:
Work (knives are not discouraged but there are a lot of sheeple):
BM 940 or BM 940 D2CF
Evenings, around the house, and "formal wear":
Microtech Amphibian, if I could only have one knife this would be it
Weekend and whenever going some place new:
Microtech Amphibian inside waistband just forward of right hip
Camillus Maxx inside waistband just behind right hip
Spyderco Civilian inside waistband jusr forward of left hip (cross draw)
The "logic" is if I need to respond quickly and for all utility needs I'll go for the Amphibian
If there is a need, I can't retreat, and I have time, the "big guns" come out. I'm hoping a Maxx in the right hand and a Civilian in the left will stop the problem before contact.