Even a small knife is handy. Multitools are fine, but IME I only ever use the blade, and single-purpose knives are better at being knives than multi tools. My favorite knife is a MicroTech 70; I can carry it in any pants without it feeling bulky.
Flippers are good too; I do like the clean lines on the MicroTech(s).
Maybe it's because I used multi tools, but I can't relate. At different points about 20 years ago, I carried a cybertool and a Leatherman (not at the same time). In both cases, I used the screwdrivers, very occasionally the pliers. I never used the blades, though. I honestly don't know when I'd want a knife. Certainly not for a daily carry.