I say you log it how you feel comfortable logging it. If you feel you shouldn't log something, then don't, no one is forcing you.
Unless you bend metal, or are going to another job and they somehow audit your logbook against someone else's, no one is going to know anything differently regardless.
If my hands are on the controls, I'm PIC, if I'm teaching/supervising/babysitting a lower-experience pilot, I'm PIC, if I'm flying with my co-worker, I don't log it. I don't fly 2-pilot aircraft, so it makes this decision easier.