I, personally, fell in love with Terai Yuki. I think her face looks much better than Aiko's, especially for more 'adult-style' manga/anime characters.

And male? Well, I didn't find Hiro particularly fitting bishonen parts. I'm sticking with M3.

A general rule - don't try to use just one model for every single character. They are versatile, but not that much. Mixing and matching diffent models always worked fine for me.

Though. a good example of anime-style poser comic is Dragon Girl Noriko. Not mine, I'm not advertising ;) Look it up, it's really fun.