Like it's always best to test things out by yourself. That's how you really find what you like or don't like.
But there is also part where things like personality tests in past have helped significantly to me understand myself. I learned about my natural strengths that I didn't know I have.
The same for sex language tests..kink tests...they help you to understand things about yourself that you took for granted. Then when you see how different other people results, you understand how everyone is different.
It's even better if you have a partner with whom you take the test together and then discuss the results.
the BDSM test itself wasn't too helpful to me.
But here’s another good test to take:
https://sexualalpha.com/bdsm-kink-test/
It will tell which 1 of 6 is your primary sex language, how you get aroused, turned off and 3 kink ideas you’re most likely to enjoy!
After taking it I learned I'm Kinky Adventurer and my girlfriend is Tantra Lover.
I was surprised that she is so relying on senses..and with that knowledge after talking..adjusted how I arouse...play with the foreplay with her.
These things help a lot.. the more you know yourself AND your partner the better you'll be off.
But of course, it's no magic pill.