I, too, log the whole flight If I am operating crew.
Splitting hairs is a slippery slope for me. Actual time in the seat vs. scheduled? Time in the bunk? Time in the jump seat during TO/LDG? Time in the jumpseat doing OPS Calcs or aircraft logbook? Duty time but not in seat - in the lav or galley?
Too much for my tired brain.
Now, PIC time I do split. If I sign the flight plan, I log it as PIC. Obviously the Captain logs that same time as PIC, but there are other instances where two crew members can log PIC simultaneously (i.e. CFI with a licensed pilot doing training) and even though I'm not getting the big bucks, I'm typed and if my signature is on it, I'm logging it.
YMMV
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