i believe that, every single human being is most characterized or marked by a single trait or strong kind of motivation/drive-

it could be the ambition to rise the ranks and do well in work;

the determination to win the heart of the girl of his dreams;

the resolve that he/she is a failure and will continue to be;

the obsession with creation of all things perfect;

the courage to show affection for another;

things like this or that.

for me, though i sometimes indulge myself the luxury of certain bouts of self-pity, envy, or even jealousy, 

most strongly, i believe, i am characterized by my appreciation of life itself.

to be living, to be breathing,

to eat, to sleep, to work;

to run, to swim, to walk;

to learn, to see, to hear;

to live, to breathe,

to love-

and to be loved,

these are the tiny miracles for me, that i find littered throughout my life.

and i am thankful for them. 

what are you characterized by?