I prefer my Monstergirls with at least some figurative (hell, even literal) teeth to them, instead of the shite portrayed in popular Japanese manga, simpering and utterly devoted to equally feckless beta-Male protagonist.
I mentioned Japanese Magna/anime as a possible origin or influence of the current type of Monster Girl stories that appear to be growing in popularity - at least based on their increasing appearance on Kindle. I never meant to imply that I like Anime/Magna as I don't. Like I said, the female as a monstrous seductress character type has been around since humans started telling stories to entertain each other. What I started this thread about specifically has been a recent development within the last few years. I do not recall seeing anything specific to the type 5 or 10 years ago. Yes, the usual paranormal witch/succubus/shapeshifter, etc. stories - but those are not the same. Of course, it is not a rigidly defined genre, so there is crossover, and I doubt any amount of debate or discussion will come up with a definition everyone agrees on. For me, The Runesmith Chronicles here on SOL and The Valens Legacy series of books define what I am thinking of when I think of Monster Girls. YMMV