There is zero reason to show the default portrait when one exists.

[MsQi]

If your portrait were on the very edge of being able to be saved, a different item *could* push it over the edge. Probably not, but I could see on some of mine a different shaped weapon potentially doing something like that by pushing the camera around or maybe blocking too much of my character's face in a way that triggered the check. Possibly a game update might have subtly changed the acceptability check as well.

I also have one portrait for the life of me I can't get it to inherit the right weapon--the glam plate it uses is has a paladin weapon on it but it's a dark knight portrait and it's constantly picking up the wrong weapon glam even if I make sure I have the right weapon glam on first before trying to edit it. No idea why I can't fix it, so I've given up on it. I'm usually pretty good at figuring out what's going on with the portraits and they've added much more informative error messages, but that one's just a lost cause.

I've never tried sharing or swapping portrait files, but I guess there could be job restricted poses if someone did. So far I have not seen any item affect the camera as far as moving it. Obviously I can't check every single item, but I'd like to know if anyone finds one. As far as I've seen it wants most of your face within the boundaries of the photo and that it is at least slightly looking toward the camera. But as you zoom out the boundaries get smaller. It seems your face can be completely obscured by any item, even your own body. I know if I'm sharing a plate I can't have a weapon on it, or else it messes with the jobs that don't match the weapon, I gotta manually glam it when I get a new one. Before I figured that out those are the only cases where it was related to something that isn't allowed, and not that the wrong weapon was in the portrait, just that the weapon in the plate, did not match the job. If we ever got enough plates it would solve several of problems.

I mean, you can still take suggestive pictures perfectly fine if you know the right tricks. So they couldn’t even fix that issue.

I'm not gonna get into what you can get away with, but there is not much limitation, and any limitation is also going to limit non-suggestive portraits.

But none of the times I've had a problem has it been something related to "suggestiveness." Just things that didn't match, not things that are not allowed.