onanyanker is right; if you start talking about the whys and wherefores someone is more likely to judge you. In my experience I found that being factual meant that I got interviews, whereas when I used phrases like "I feel" or "I think" I didn't hear from the schools I was applying to. my advice would be to tell them what you have done and what qualities you can offer. eg., "I have organised a variety of primary liaison activities." "I am enegetic, hard-working and committed."