Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. These traits are represented on a continuum, and most people fall somewhere in the middle. One of the unique aspects of the Big Five test is that it doesn't just share flattering information, but provides a well-rounded view of an individual's personality.
Another accurate personality test available online is the 16 Personality Factors (16PF) test. This test was developed by Dr. Raymond Cattell over several decades and is based on the belief that personality corresponds to 16 different primary trait constructs. These traits exist on a continuum, meaning that we possess all of these characteristics but only up to a certain degree. The 16PF test provides a comprehensive and in-depth analysis of an individual's personality, making it a reliable tool for understanding oneself and others.
It's important to note that while taking personality tests can be a useful tool for self-discovery and understanding, they should not be the sole basis for defining oneself or others. Personalities are complex and multifaceted, and these tests are only one way to gain insight into them.