I've carried everything from a 4 blade/tool scout knife to a single blade Opinel and liked them all. But when I boil it all down and look at what's left in the bottom of the pot, I've spent most of my life carring mostly two or three blades. From age 12 to 20 I carried a scout knife my dad gave me. It saw a heck of a lot of service. Wnen I joined the army, I left it home, fearing t would disappear in the barracks. For several years then I carried the all steel army issue MLK knife, also called a demo knife. sometimes I carried a Camillus TL-29. Both the TL-29 and the MLK knife was issue gear in the supply room of most engineer companies. Late in the Army career I carried a Buck 301 stockman. That was a great knife, and if I needed a can opener or screw driver, I had my P-38, which would do both.
In middle age I made a radical switch to a peanut. My dad had passed away, and his old one was sitting there, so I started carrying it, for reasons I'm not sure of. But I made the switch to two blade jacks then. Had a barlow for a while, and another peanut.
I had an on and off affair with Opinel's from 1982 to recent. I love them, but for some reason I just feel better having some second blade available. I like the jack layout, with both blades on the same end, vs the pen layout. Don't really have a reason, just like ti that way. Like the way some folks like chocolate ice cream and others like vanilla, or even mint chocolate chip. Serpentine jacks, barlows, Texas jacks, all have an appeal to me. I still have a few single blade knives around, and like them, and use them. But the epiphany came to me last month when I was setting out on a cross country trip that would mean my being away from home for 5 weeks. I was going to set out with a single blade knife in my pocket, but at the last minute, literally, as I was carrying the bags out to the car, I had a anxiety moment and went back and grabbed my little serpentine jack, the peanut. I wanted that second blade.
That's my story and I'm sticking to it.
Carl.