Interesting topic Mike.
Yes, I do believe the term 'portrait' comes with certain expectations. In my opinion, the client often has an idea in mind, then goes in search of the artist that comes close. Rare is it to come across individuals that are totally open to whatever crazy idea the artist has in mind. They want to see most of the face, pretty smile, distinguished pose..all the points you mentioned. Oh, heavens, and we
must have the likeness.
Personally, although most of my families were a joy to work with, it became exhausting to convince them to try something different, which I desperately need to be engaged in the project. For example, asking them to stand in a rose bush
I'm moving on a bit. Not saying no to commissions, but not actively seeking them out either.
Hope I'm not being too negative.
Go for what inspires you.
Cheers,
Stanka