Each zodiac sign has quirks that can test relationships. Aries are impulsive, while Taurus are stubborn. Geminis are moody, and Cancers are overly sensitive. Leos crave attention, Virgos are perfectionists, and Libras are indecisive. Scorpios are controlling, Sagittarians fear commitment, Capricorns prioritize work, Aquarians need space, and Pisces are often lost in their own world.