One of the frequently asked question is that I am having poor physical personality so it looks this will hamper my selection?
This is just a fear psychosis and poor self assessment. In fact you need not compare with anybody as you are the best. Selection panel at Personal interview does not bother for physical personality but they are concerned at professional personality.
Can do attitude, positive approach, verbal and non verbal communication power, skills of handling situations, domain knowledge, understanding of global issues and current affairs, gestures, etiquettes and top of all gift of gab can lead you to success at Personal Interview.
Preparation and practice for PI with mock exercises based on study will bridge the gap to confidence. Reading habits must be developed to read beyond text books.
High confidence and not over confidence must get you ticket of selection at Personal Interview.