I've been thinking about getting Miki, From what I've seen she is capable of some extremely goofy expressions (as is Koji) ^_^ As someone who does mostly cel shaded images I've gotten by fine without hiro, Though I probably will get him when i have need of a younger looking male. If you morph M3 the right way and cel shade him he fits in just fine with Aiko/animedoll. It's not at all uncommon in anime to have more realistic male chara designs right next to more stylized female ones.