A side note i notice.
MC gender seem to have difference in skill set
Example: Let say you start with Female MC gender and complete and later on start new game + with Male MC gender. Your Male MC gender will be at level 1. I suspect both MC gender is a separate entity.
Food for though?
Probably not skill set but different variable when it comes to coding. So there are 2 separate possible MC variable (male and female). But saying it's skill set means that male character has different stats/ unique skills and it might cause confusion.
To answer your questions, the first two is no. Jack's inventory and O's inventory are two different ones altogether. The game won't even let you carry over any items on new game+ except for your already equipped ones.
MC gender doesn't change anything, I suppose. Though I haven't tried but there's no H-scenes for MC.
About the receptionist one, I don't know cause for me, all sex scenes in this game leaves me with a bad taste. So I just went for Salvation end and go to recollection later.
Guess I'll just play FemC and see if there are unique CGs/ dialogue for that. Well that was a complete waste of potential being able to choose gender(cyborg body) (yet the MC is clearly male in intro)
Damn all those grinded gold and stuff in intro wasted lol. Oof my coins (I hope coins is retained..)
But yeah, the areas wherein I obtained some unique weapons are still the same in post intro (bandit cave hidden weapon) which was the best weapon in intro.
But that brings the question why have the cave boss drop a weapon that is not useable since it disappears? Maybe we'll be able to become jack again in the finale or some shit?