It depends on the face shape. Sometimes, if the woman has a larger forehead, I suggest a side bang. It will frame her features better. For myself, since I have a small face and heart shape, I prefer no bangs.
I like the side bangs look but in all honesty the no bangs and full bangs are not too far behind, I think it is one of those ones where it depends on the girl any of the 3 can look great on right girl.