I think from all the "new" games that they have done, none of them has the "good" amont of youkai that i like. It's either just 3-2 from all the batch of enemies.
The only games i have managed to keep are 2 games from the BIG GAMES since they have a good amount of cg's + Enemies that i like + pregnant scenes (birth), all others are just.... ehhh for me.
My favourite enemies gotta be:
Tanuki, Old man, Catgirl, Fish guy, Fire cat, frog (sadly they keep using him as tentacles. No more sex), snail (no tentacle again), oni, Snow woman.
And i think 2 enemies no longer are used, which are the headless horse and the weird weasels with blades