This is a moot point, since the majority of artists who are pointed out for ‘suffering’ from same faces syndrome are artists that don’t just want to draw pinups, they are artists who want to create characters and tell stories with them. And its pretty hard to tell a story when your readers can’t tell your cast apart.
Besides, shouldn’t we all strive to be the best artists we can be, no mater what it is we want to draw? I don’t see any good reason not to have diversity (at least) in the faces we draw.
I feel the most comfortable with anime, but often times I like to test out other styles such a semi-realism.
I stopped taking art classes in high school because every teacher would see what I had in my sketchbook and literally say “Ew.” or “anime isn’t art.” and they wouldn’t teach me anything to break away from that style.
I tried another class this year, hoping a college teacher would be more open to all the different styles there is out there. On our first project I drew a girl, and you know what he said?
“I think you should find your own style. All manga is the same.”
I’ve stopped trying to impress my teachers at this point, though learning on my own is difficult.