Most Helpful Guy
Men are generally not that picky about women's height/boob size. There is a decent range of boobs/height that if it's proportionately beautiful to the girl, then we are happy.
But to try to give a useful answer, we generally do not like girls who are as tall as us or taller than us, girls that are overweight, or girls with a flat chest.2
Most Helpful Girl
A woman happy with herself and healthy.2