As a manager, what I wear for the day chooses what I carry to some extent. I ALWAYS have a knife with me of some kind.
Anyway, what are my daily carrys?
Usually a Spyderco. Monday through Friday, if I am visiting a customer or expecting a customer visit, Dockers are the order of the day. A Sypderco Dragonfly, either the older one I have with plastic (Zytel?) handle and serrated blade or the new one with stainless handle and plain edge.
If no customer visits are expected, "decent" jeans are worn. This gives me a little more latitude in which knife to carry. Those days I rotate between a Spydie Calypso Jr. (stainless handle, serrated blade), a Cold Steel medium Voyager with tanto plain edge blade or my latest, a Spydie Native.
If I'm outdoors working at my parent's farm, or on my motorcycle, I may have the Endura plain edge in an aftermarket sheath, but probably one of the three listed above clipped to a pocket.
Recently acquired a Keshaw Ken Onion Mini-Task, but the girlfriend decided the fast opening action worked better for her than thumb studs or holes, so I can probably kiss that one goodbye. (She would really like an automatic, but since I live in MI and she lives in IN, that probably isn't too great an idea.)