As far as women in general go it's all preference. I'd prefer someone like Videl over someone uncaring and unpassionate like 18. Videl has spunk, she fights, she tries to learn new things, and she doesn't let people push her around. If you're more of the old fasioned type you might be more attracted to somebody like Bulma, who is intelligent, but often times helpless. It depends on what you are willing to put up with.