Final answer:
Discussing when emotionally unstable individuals have their best showing depends on the context. For school-age children who are developing emotionally, this might be in environments where they feel safe and accepted. In the case of actors, their peak performances come from fully committing to the character's intentions in a safe space.
Step-by-step explanation:
The query 'When do emotionally unstable men and women usually have their "best" showing?' does not fully align with the reference information provided. However, if we were to relate the concept of emotional stability to the developmental stage of school-age children, it's notable that between the ages of six and ten, children are developing their self-concept and emotional regulation. During this stage, they can exhibit a range of emotions from seeming like small adults, focused on schoolwork and responsibilities at home, to displaying more immature behaviors reminiscent of earlier childhood.
Discussing vulnerability and emotional availability touches on aspects that might relate to the settings in which individuals—children, in this context—display their best emotional state. This might be in environments where they feel safe and accepted. Therefore, acknowledging this emotional fragility, it is in supportive and understanding settings such as with trusted family members or friends, where emotionally unstable individuals might display their most balanced or "best" showing.
In the context of acting, as per the second reference, an actor’s emotional expression is often at its peak when they are fully immersed in their character's intentions without the fear of vulnerability. It's in these moments, whether practiced by professional actors or experienced by individuals in safe environments, that emotionally charged performances, or stable emotional states, are best realized.