The angle between your signs — the square (90°)
The square is the aspect of tension: you want the same thing at the same time, just not the same way. This bond never falls asleep. It asks you to pick your battles, and makes you both stronger when it holds.
Your elements — Earth and Air
Air thinks, Earth makes it real. One has the ideas, the other knows how to make them stand. Translation is often needed: you do not measure time the same way.
Your rhythms — fixed and fixed
Two fixed signs: you both hold on. That is your strength, and your friction point: when you disagree, nobody gives in first.
Your rulers
Taurus is ruled by Venus, Aquarius by Saturn (Uranus in modern astrology). Desire and harmony, facing structure and time.