I usually just carry my favorite...as long as it is my favorite...Can be years.
Any others have to wait their turn.
Sonny,
Curious, what is the longest you have EDC'ed a knife and what was the knife? I'm always fascinated by knives that are truly EDC.
In general if I can add may two cents to the thread:
I would second the nomination of gem and rock cases, I have some nice ones from when I used to collect stones.
But, I would personally prefer not to display them in an open case like that/advertize their existence to anyone who may drop by. I think storing them in your dresser or someplace sufficiently out of the way as you do already is a better option. But, they aren't my knives and this is just my take, so if you would like a display type set up, again look at the gemstone cases, etc.