Size of the figure doesn't matter at all.

Height of a person definitely matters as far as his appeals and activities are concerned, In sports and security services, the physique play a massive role. In physical appeal also, a person with adequate age=wise height draw attraction, Shorter people are no less people when merit counts. One may not be an Army General for his physical shorter being, but he can easily be the Chief Executive Officer of a trillion dollar company. Intellectual capability cannot be related to physical robustness.

Does not matter

For first question it does matter to some extent only
for second question ..not necessary a taller person has great personality,all are not like amitabh bachchan,even he was not confident before entering movies.
some short people have great personalities.

I did a survey exploring height preference in men and women for the opposite sex. The stereotype is that women prefer tall men or at least taller men, and that men prefer shorter women (relative to their height). The results confirm that pattern, with men showing slightly more flexibility than women in their preferred height range. Interestingly, I found some truncation in the height range preference as women get older. The mean remained the same in older women but the high and low end height range were curtailed. With men there was a less clear pattern which showed an increase in the high end of the preferred height range with age.

May be yes, but not always

Who said so...? Well, what was the size of Shri Lal Bahadur Sastri ji...??