Their voice does have a little something to do with it, but I think intelligence and personality is a very large contributing factor in my decision making progress. They also have to be outgoing, because I am introverted and the chances of me approaching her are minimal, no matter how much I lie them. I also like to see the sweet affectionate side of girls. I look more for emotional fulfillment, but I would still like them to not be ugly at least. I would still date a girl who is subpar in the looks department if she met all other qualifications. I am talking strictly about my theoretical perfect girl here, though. Not my perfect one in reality.
Musicians, love women who are musicians. Basically if they are creative/artsy I'm sold. Also I view smart and intelligent as two different things. She doesn't need to be a brainiac, but she needs to be passionate about something, and usually I see women not being afraid to show they are passionate about something, and I like that
Her smile, hair, PERSONALITY, if they're not super crude and gross, minimal makeup, laugh, wit, ability to make you laugh back, willingness to just go with anything for awesomeness's sake, knowledge of how to make you just a tad embarrassed or uncomfortable, and comfortable enough to show their own embarassed side without being defensive and laughing about it