For me, it's scales, scales, scales and scales again. "Why?" is what you may ask. I'm aware that most people regard scaly creatures like snakes and lizards as a kind of crittery, and they have a bad reputation. Which is not justified at all, by the way.
Anyway. Most Mamono possessing scales have the following traits in common:
- They have a high self-esteem and won't take anyone as their husband.
- They're strong, both in mind and physique.
- They're loyal, sometimes to an absurd level.
I think you would be kind of insane if you'd take these as bad character traits. On the other hand, let's look at the Mamono possessing fur.
- They're moody, even violent.
- They take anything with a cock as their husband, as most fail to control their instincts.
- They rather force their will on you than making you fall for them.
Of course, there are still our feathered friends, so lets not forget them.
- They abduct men, with a few exemptions, but release them after being impregnated.
- They're usually not overly outrageous girls, rather calm and lovable.
- They come in large groups, which is also nice, depending on the individual test.
You don't believe me? Then, let's compare three of them directly.
Lizardman = A proud, skilled warrior. Yes, she's violent, but she only wants to determine which man would be best to produce offspring with, something you can hardly blame her for. On top, she makes a great housewife once you made her yours.
Hellhound = A ferocious dog, untamable, uncontrollable. She'll rape anyone dumb enough to go near her. You're not in the mood? Rape. You want to cuddle? Rape. You need to go to your father's funeral? Rape. In return, you gain a watchdog, an admittedly great one at that.
Siren = A singer, which is always nice. Yes, she lures ships against cliffs, but there are always enough other Mamono around to take care of the sailors. Also, she's petite, which is rather tempting for those that are not complete Lolicons (yet).
To reach my conclusion, I think I can say that scales are the most preferrable, followed by feathers. Of course, if you want a needy bitch, go for something furry.