<p>I think they count length, cohesiveness, and persuasiveness above all. Variety of examples (Ex. lit and history, lit and film etc) us also beneficial. Three examples are not necessary, and it is much better to have 2 in depth examples than 3 brief ones. Be confident, do not use first-person unless using a personal example. Clearly tie into your thesis, use cohesive transitions and always use your examples to explain why your position is correct/</p>