Be the best of both worlds, be cute with some sexy charm. It's very possible. Have that bit of spice that makes you a little risqué, but when need be that cute, sweet lady that you can't help but treat like a Teddy bear.
"Guys want a good girl that acts bad." not sure who said that, I think Jim Carrey lol. But you get the point, a good girl acts right at heart, but can add that fun into things.
It's both acting and looking, if you want a definition look at 90% of Japanese girls
Cute girl all the way for a wife, cute IS sexy, sexy is not sexy, it's f***able, but cute is sexy and feminine so I'd rather have a cute wife to come home to every night