Detachment and a hint of peculiarity. What to remember is that strongly Aquarius-influenced people are always hard to pin down. They can be enthusiastic and open, socially expansive, but tend to keep their distance, seldom making a complete emotional investment. Always "cool". While the reputation of Aquarian unconventionality is quite true, it is seldom a striking feature of their appearance. In spite of the bursting release-energy of their ruling planet Uranus, Aquarians are frequently humble and relatively quiet persons. Sure, there are many utterly extrovert and bizarre representatives for the sign. And yes, many match their inherent aloofness with a markedly bohemian (or unusually formal or classic) style of clothing or some other striking accessory or ornament. But these sorts of things are commonplace today and hardly original. Look for a tolerant, civil, shock-proof, very friendly and amiable attitude.
Notice also the suspected Aquarian's group-behaviour. Aquarians relate ambivalently to group activity, crowds and associations. While naturally equipped with a collective "feel" and attraction to the dynamics of human interplay, Aquarians are essentially loners and individualists, intent on not being swayed by public opinion and attitudes. They usually don't aim for the center of attention, and probably because of this gravitate towards it anyway. They have a relaxed yet electric charisma that attracts because of its lack of eagerness, and also by the Aquarian's interest in other people and wide-ranging humanity. Often strongly built; wide shoulders and clear eyes, an intellectual, impersonal air that can seem (and be) quite unemotional. A decidedly, cool, buzzing radiation, but at a low frequence. Aquarian men are masculine in an androgynous way, quietly paradoxical and calm. Women are open and progressive, quite alluring in their distance and indifference. If attractive they're usually very attractive, but in quirky, originally glamorous way.
Celebrity examples include Geena Davis (Sun in Aquarius exactly opposite Uranus by the Midheaven), with that highly charged, erratic charisma and sharp intellectuality, Tom Selleck (Aquarius Sun in the first house exactly trine Uranus); essentially Aquarian with his calm, friendly and humane yet detached and individualistic demeanor, and Mena Suvari (Sun, Mars and Mercury conjunct in Aquarius) whose off-beat, alluring beauty and glowing intelligence is characteristic.