No subject-matters (themes or concepts) of your animation should be something you can think of in seconds that are often worn-out, clichéd and predictable.
It must sound unfamiliar, odd, or peculiar in a way, and has an element of surprise or unexpectedness.
The Bureau says, “opportunities should be best for those who have a wide range of skills or who specialize in a highly specific type of animation or effect.”
“I'm not different for the sake of being different, only for the desperate sake of being myself" - Vivian Stanshall