Subjectivity is a permanent split. It bears a gap within itself, a wound it can never overcome.
Subjectivity is inextricably involved in the process of constituting objectivity. How this happens is for husserl the 'mystery of mysteries'.
Subjectivity is a 'circulating capacity', which is to say that it is something that is partially gained or lost by hooking up to certain bodies of practice.
Subjectivity is an achieved agency, a victory over the forces of entropy and undifferentiated chaos. It is the urge by which an animal, lacking wholeness, feels to preserve itself by resolving the internal contradictions it encounters (i.e. Hunger at the most basic level).
Subjectivity is, for the Germans in the late 18th century, characterized by self-realization, not in relation to some ideal order... it is something that unfolds from the subject himself in his own realization, and is first made determinate in that realization.
Subjectivity is, in contrast to objectivity, the idea that one does not look at a thermometer to determine how cold people feel.
Subjectivity is an effect of late capitalism: Decentered, fragmented, non-essentialized but at the cost of the loss of the acting subject.
Subjectivity is an achievement constantly in need of further achievement. It is the nature of all organic being to fight against internal contradiction and to realize its subjectivity in the world through processes such as hunger and satiation.