It pretty much depends on how I feel at any given moment. But, yeah, normally I don't carry the same knife for more than about three days in a row. Plus, I usually carry one knife during the day (work, etc.) and then switch to another for "evening wear."
I always carry the same two REKAT folders: A Sifu, and a Carnivour Cub. I see no reason to change, UNLESS I'm going to a place that won't allow a blade over 4 inches. In that case, I replace my Sifu with one of my Carnivours..
oh yes i shift around a lot - tend to carry more fixed blade stuff in the fall and winter, alternating MOD Razorback/Gerber mark 1 /CRKT companion - in the summer usually carry SIFU when biking, and alternate it w/my crawford custom Kasper/Spydie Ti lum tanto/BM AFCK sometimes carrying 2 - and i also carry my gunting quite a lot, but only on my skunkworks belt sheath - so yes i alternate around all the time - it takes a while to adjust though, sometimes i will find myself reaching for the compression lock on the top of my BM AFCK, which has a liner lock lol - and reaching for the rolling lock button on other knives, etc - so be sure ya know what ya are carrying and be familiar w/operation too -
I usually carry the same knives all the time:
Right pocket...Al Mar Sere 2000, Buck 3 blade pocket knife.
Left pocket....SAK Soldier
Back Right ....Mini AFCK M2
Lower Right....Mini SOCOM, red
Lower Left.....SAK Fireman
Belt,right.....Victorinox RS multi-tool
Neck...........Camillius Mini-Talon, talonite
And when I walk the Rat Terrier (daily)I usually grab my 4'rattan lahti with the Cold Steel Bushman attached to the top.
I work in a defense plant, design group - my daily "sheeple freindly" carry is a W-H amber Kestral. The minute I change clothes, the BM 705 is in my pocket. In my attache there's always my L'man wave and on my keyring a "Micra".
I usually swap out on a monthly basis so I can get used to the knife all over again. My rotators are BM710 and an Emerson CQC7B. Also have started carrying a SAK Recruit in front left pocket on an ongoing basis.
I agree with Nathan. It depends on what I'm wearing. I have knives that go with different outfits. I always wear 'that' knife with 'this' gown, dress, skirt, jeans, bikini, etc. I try to match the knife's personality with the mood I'm expressing by what I choose to wear. Makes sense to me!