This consistently works to help students come up with about 3 to 5 colors that define their personal color palette. And it usually freaks them out to see colors that have so dominated their lives on a subconscious level, brought to a conscious level, where they can use them consciously to help define their personal illustrative styles.
Here's how it worked for my students. Here is what Deanne came up with.
Curious about MY color palette? I wrote all about this process and my own colors year ago at https://dulemba.blogspot.com/2008/06/office-redo.html.