<p>It's not the topic, it's what you do with the topic.</p>
<p>Choose the topic that allows you to write the most personal, detailed, honest and revealing essay. To write something that only you could write.</p>
<p>Cliche imo means commonly thought or said, something that a lot of people could write. For example, a cliche about sports might be "We won the championship and I learned that hard work pays off." or "We lost the championship and I learned how to accept defeat." Such an essay could be written by many many people and won't distinguish the writer from other applicants. Nevertheless, it is quite possible to write a personal, detailed, honest and revealing essay about sports. In fact, the writer of one I read is now at HYPSM.</p>
<p>Similarly with your grandfather. It's quite possible to write a cliche essay about a grandfather. It is also possible to write a personal, detailed, honest and revealing essay about a grandfather. </p>
<p>It sounds like you are inclined to write about your grandfather. If that's your choice, make sure that the essay ends up being about you, not just about your grandfather. Your grandfather isn't applying to college! In showing (not telling) what you do with your grandfather, you should imo actually be revealing yourself. </p>
<p>Thus, for example, humor can be great, but aim for humor such that the bottom line of the humor to the reader isn't "grandfather is funny" but rather "Claire has a great sense of humor." And you get to that not by saying "I have a great sense of humor", that's a telling and it's not persuasive. Rather, you reveal your sense of humor by showing it in your relationship with your grandfather. You needn't even use the word humor, the humor can be obvious in what you show of yourself, and the showing can be persuasive.</p>
<p>Here's a helpful (imo) link:</p>
<p>Show</a>, don't tell</p>