Remember to include insight into WHY you liked certain courses. And answer truthfully--don't try to anticipate what will sound best to an interviewer. For example, it's fine if you really liked chemistry. Just be sure to explain the specific things you liked about it so it's clear that you are not going to be unhappy having non-chemistry-related tasks assigned to you.

"I loved my art history classes. Many of my classmates thought they were too slow-paced, but I appreciated the time to study and look at the details of different pieces. Those classes also taught me how to write essays more logically. They were classes that taught me skills that I have repeatedly been able to apply elsewhere."