I voted for Chi-chi. Sure, she's insane, but I like girls with black hair and Videl is too much of a tomboy - besides, we all know she'll never leave Gohan. Chi-chi was also quite a looker once, you know. I think a few sagas and being married to Goku took their toll eventually. Besides, she attacked Super Buu with a broom. That gives her bonus points.
Bulma has got strange green/blue hair, and I'm not comfortable in a relationship if I can't figure out what colour her hair is. As for #18, she is <i>scary</i>. I must emphasise that - she scares me. She is an <i>evil robot with metal parts who kills people by punching them in the chest so hard her hand sticks out on the other side.</i> Her eyes are creepy, her voice is creepy, and the way she let Krillin name their daughter after one of his old ex-girlfriends is also very creepy and wrong on too many levels.
As for Bulma's permanently closed-eyed mother, she takes scary to a whole new level. She's Super Scary 2, or something (that was my attempt at a pun for this thread, thankyou for reading it). I don't think she has to see, as she tracks her prey by their scent and the heat of the warm, delicious blood that she senses within their veins. Nobody is safe from Bulma's Mother.