I'm pretty new to the forum. It came to my attention that there is no one personality system that's better than the other. That's like saying one race is better than the other.
Essentially, all systems are the same. Just different variations.
I think it's great to study other systems to blend in or see patterns. Every system has a weakness, so by using other systems, you tend to fill in the missing gap.
Here are some resources that I've came across. If you take all of them, your guaranteed to understand yourself at a much deeper level, rather than just one system.
-Know Your Myers Briggs Type
-Know Your Enneagram Type
-Take StrengtsFinder 2.0
-AuthenticHappiness.com (take short character strengths test)
-Your Socionics Type
-Your Kolbe Score (from kolbe.com)
-Your Love Language (5lovelanguages.com)
Note: If you take free myers briggs test, you can find someone with the same type who took other test that you haven't to find patterns. All the test are essentially free, if you do proper research. But to get full accuracy, you should invest in each system.
Also, if there's other systems that has helped you, please feel free to share. I use a mind map and I find the similar patterns in all my test results to pin-point my fundamentals.
Share your insights below.