Back in the olden days, I carried a Kutmaster (girl) scout knife for about 8 years, until I replaced it with a SAK Explorer, which I carried daily for the next 3, until my brother lost it.
After that, it was a succession of SAK Classics for about 11 years, until the TSA relieved me of all of them.
Trying to find the perfect one-hander, I carried an M-Tech cheapie for a month, a SOG Salute for a couple months, a Leek for a couple months, a Kershaw Shallot for a couple months, and a BM940 for about 6 months.
I'd like to say I've EDC'd the Blue M390 Para2 since I got it in early January, but I've subbed it out for a med Stockman, Leek, or Sage 1 just a day or two per week when I felt a PM2 might be kinda large (like going to church or visiting my daughters' school.)
I expect the Para2 will be my primary EDC for years to come - I'm that happy with it. But I'll continue to replace it with the Sage at church, the Leek when I wear shorts, a Salt I when I go swimming, and the Stockman when I work @ school. Does that mean I can only count a max of 6 days???