I've recently started putting my toe into this system- it's more than a personality type test. It helps you determine your passion, what makes you tick, and how your greatest strength can be your greatest weakness if you're not in a healthy position. Here's some information: https://www.enneagraminstitute.com/h...m-system-works
This same site has a good self-assessment test (takes 30-40 minutes and costs $12). Turns out I'm a 9 (Peacemaker). The negative side is avoiding conflict at all costs.