The self (circle) is divided into four somewhat equal parts (I say somewhat because although they are, in essence, equal, it is usually the case that the section dealing with emotions takes the most practice to balance.)
The four parts are Fire, Water, Earth, and Air. The /qualities/ of these elements are as variable as the manifest elements themselves, so I prefer to present the manifest expressions prior to relating them to personality expressions.

MANIFEST EXPRESSIONS

Fire
Flame (all--from the flame of a candle through hearth fire to raging, out-of-control forest fires), Electricity, Fission, Friction, Combustion, Light, Brilliance, Heat, Transformation through interaction with other elements

Water
Lakes, rivers, oceans, dew, rain, Aquesous bodily secretions, Moisture (condensation, dampness, steam), Wetness, Liquid, Nonconforming limitlessness, Mutability, Magnetism, Transformation through interaction with other elements

Earth
All things solid, That which is tactile, Tangible reality, Subject to the transformative function of decomposition, Ground; both in its electrical sense and in its relativity to that which supports life (as we understand it), Structure and form, Dimension, Time, Existence (as a sensate phenomenon), Transformation through interaction with other elements

Air
All things atmospheric, Gases, Space, That which is celestial, Theory, That which is ethereal or etheric, Frequency, Noumenon, Sound and the medium through which it travels, That which is invisible

PERSONAL EXPRESSIONS

Fire
People display the qualities of Fire when they are: Spontaneous, optimistic, lusty, impetuous, outspoken, demonstrative, combustible, ruthless. The qualities of creativity, self-expression through the spoken and written word, enthusiasm, aggression, and, often, boisterousness are demonstrations of a Fire-dominant individual.

Water
People display the qualities of Water when they are: Artistic, empathic, passive, feeling, sensual, confused, unpredictable, dreamy, indecisive, doubtful, inscrutable, enigmatic, romantic. The qualities of intuitiveness, inventiveness, responsiveness, nurturing, and the use of innuendo, self-pity, and victim-consciousness because of a lack of personal boundaries are demonstrations of a Water-dominant personality.

Earth
People display the qualities of Earth when they are: Productive, precise, calculating, sexual, determined, stubborn, aesthetic, petty, belligerent, brave, predictable. The qualities of perseverance, administration, fixety, strategy, and othodoxy are demonstrations of the Earth-dominant personality.

Air
People display the qualities of Air when they are: Changeable, inspirational, logical, intellectual, idiosyncratic, exacting, unpredicatble, challenging, abrasive, solitary, musically inclined, expansive, explicit, technical, scientific. The qualities of rhythm and harmony, quick-temperedness, rigidity, and the tendencies to analyze, get caught in the past, and to display either too much emotion or be unable to express emotion are all demonstrations of the Air-dominant personality.

There you are (and it's likely riddled with spelling errors and the like--I apologize.)