I used to have a job that was really into the Core Value Index. I thought it was pretty awesome because their categories were really simple and there are only 4 so you can really wrap your head around the whole thing at once.
It’s not a full personality test, it’s more focused on trying to answer the question “How do you want ideas presented to you?” And. “How do you prefer to interpret ideas?” I found myself making meanful changes in how I worked with coworkers where I knew their results, which isn’t something anyone can manage with more complicated tests.