Domineuce

Wind has a direct connection to weather, often then not wind could have a relation to gravity as whats been said, but these all originate from Chinese martial arts. Wind's all about evasion and momentary repulsive defenses. The point of the Air Nomads teachings ended up being to avoid confrontation so they were the most famous for Evasion, Speed, and Light Power.

Lol, Aang can run hella fast, his center of gravity to the earth is light, and using air alone to a certain magnitude he could manipulate the other elements (like when he lifted that rock with a gust of air to give the impression Momo could earth bend.)

Airbending has a light touch over the others, If I had to guess it's probably the universal influence.

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