You are average of your top 5 friends. In Chinese Metaphysics, while it would be important to surround oneself with people with positive energy and vibes. Likewise, some folks are naturally endow with negative ones.
“跟着蜜蜂找花朵, 跟着苍蝇找厕所 ”
“Follow the bees we end up with honey,
Follow the flies we end up with toilet … ”
Therefore, in BaZi 10 God (十神) structure, we need to be mindful whether Friend (比肩) and Rob-Wealth (劫財) stars in the chart triggers a positive influence or a negative vibes. And, in 8 Mansion (八宅), whether we see others as positive or negative also depends on the sectors such as longevity (延年) as well as Yin Yang (陰陽).
Just as, Rob-Wealth (劫財) can be positive influence. Friend (比肩) can give off a negative vibes. Some knowledge of face reading can help one size things up a little.
Friend (比肩) and Rob-Wealth (劫財) stars in the chart are regarded as similar element (同五行). General rule of thumb, the optimal number to have is approx 2 Characters in a 10 Characters analysis (See: 8 Characters or 10 Characters, Balanced or Harmony – 8文字または10文字、バランスまたはハーモニー8)