As a woman I prefere deep voices. I can't really tell why? I think they just are better a portraying a sense of security? So I guess it's the illusion of being easier to depend on and easier to trust them? Also deep voices tend to sound more sexy to me I don't really like extremly high voices (squeaky) (male or female) as they tend to sound really really annoying when mad. But honestly I don't think I have ever chosen a boyfried based on his voice? A nice voice is a plus point at the beginning but nothing more than that.