Age and time... both decide many things in one's life. History, experiences, family, relationships, ambitions, goals, motivation, energy, recklessness, knowledge, wisdom, interests, health, stamina, skills and much more...
An aging character usually have more experiences, having gathered knowledge throughout their life. This is represented by a character gaining age traits as they go through the different age spans, as well as proficiencies. These features are usually balanced out by the aging characters faltering strength and health. Younglings, unlike their elders, lack life experiences and knowledge they've gained throughout life.
Age Traits
When creating a character, you must also decide upon an age. This age falls within an age span from childhood to elderly, granting different effects, both positive and negative. Additionally, a character chooses one Age Trait for each age span they have entered. Age traits are features that exceptional individuals possess, those of the adventurers.