Circle C Bluegrass bone TrueSharp SS Case Peanut… Its been a constant companion, I’d say not carried for maybe only a month total in the last ~8 years, it was even my only carried knife for about a year… Hands down, without a doubt my top favorite!
(can’t beat the classics, A Case peanut, a Missouri Meerscham corn cob, and CCR on Vinyl!)
My next favorite is a bit different, one I’ve had almost as long as the other, almost ~7 years, but had only carried more than once or twice a year until this last summer… Now it gets a Lot of carry and use! 1 of 6 hand built prototype Folding Hunter, Stag and 154CM, by Amherst Cutlery.
Alaskan, Adventurer, Engineer. 
Nothing like a good knife.
Oh, I dunno about that, I’d really like move “good Knife” down the alphabet a ways and have a “good Wife” instead 😉