To answer your question, it seems that significant factors are:
Will you use filters?
What is your intended final print size?
Are you ok with a degree of apparent grain?
Do you like portraits with shallow depth of field?
In my case:
I shoot 8x10, using HP5 for portraits, but FP4 for everything else. I use filters most of the time, with any subject. If I’m going to shoot large format, I prefer grainless images, so with my very sharp but somewhat grainy developer (pyro), that limits me to 4x enlargement in FP4, maybe 3x with HP5 to allow for occasional contrast (and thus grain) expansion. I don’t yet need portraits bigger than 20x24, so I’m covered. I shoot portraits between f/8 and f/16, tops, often moody through a strong green filter whenever light levels allow. So far, portraits have landed in the 1/4 to 1/15 sec range, which works since they’re not in motion ( I have a mamiya for that).
J