Ok, I just got a thought in my head.. How could a hard headed guy like vegeta could fall for a girl then marry her. My view on the matter is that there is no way vegeta fell in love with her, I think he got attached and acostumed to the planet earth, so he decided to start a family there just like everybody else. I think it was more of becoming acostume to the planet and the people, wanting to belong there, thats why he decided on starting a family in the first place, not because he felt in love with bulma..