cyclops, succubus, angels and demons are not monster girls, not in my book. lamia, slime, arachnid, harpy, centaur, dragon, zombie, octopus, mermaid, and others like these are monster girl.
Actually, my answer is "a good blend of all genres".
I love vanilla and monstergirls, and I'd like nothing more than a wave of those genres, but there are genres that have yet to be published (although, Fakku's library is still relatively small, so don't mistake that for a criticism). I believe we are lacking in things like ntr, forced, yuri n yaoi, femdom, loli, and futanari (although this last one was an option in the poll, so maybe Fakku has someone in mind?). There have been singular chapters in the tanks released, but nothing to solely cater to a specific taste, and I believe the afore mentioned genres could be represented more and are well-known enough to be considered for publishing.
TLDR: I like me some vanilla and monstergirls! But Fakku's library could use more of everything mentioned in (and out) of the poll.
Out of those choices I'd love to see more futanari. One of the first hentai manga I ever bought was Hinemosu Notari's Read Me and I've loved it ever since.