Twins and triplets with the same Zodiac sign

"garapoes;c-16373870" wrote:
Well, the zodiac sign is based on their personality. And twins can have a different personality. It doesn't bother me that much..

In The Sims 3 it wasn't. As traits replaced the personality lines, the zodiac signs were random.
Having twins get the same zodiac sign in The Sims 3 is much rarer than in The Sims 2. The reason is that babies get their personality points from their parents in The Sims 2 (and that affects the zodiac sign). So if you got triplets in The Sims 3 with the same zodiac signs, you may want to consider yourself extremely lucky.