How can a writer best highlight the qualities of the subject in a personal narrative? Which sentence best shows the reader what the narrator’s brother is like?

For a whole month, my brother came home every day after school and worked on his college applications.
My brother, the oldest child in our family, is six years older than I am and nine years older than my sister.
My brother is very motivated to succeed in achieving the goals he has set for himself.
After my brother went to college, I thought a lot about the goals I want to achieve for myself.

the way you did it is okay (not really the best) but it could use a little work.

explanation:

dreams can say a lot about the personalities,thoughts, feelings, and intentions of people, what exactly do dreams mean? are the dreams we have   a result of our thinking process or are they connected to our hidden desires? facts and fiction will be used to uncover the truth behind our dreams.

it was surely an odd creature that one made up by reading the historians first and the poets afterwards a worm winged like an eagle; the spirit of life and elegance and charm,   in a kitchen chopping up suet. but these creatures, monst'r however entertaining to the imagination, hast no existence in fact. what one might doth to bringeth h'r to life wast to bethink poetically and prosaically at one and the same moment,   thus keeping in toucheth with fact—that the lady is mrs martin, ag'd thirty-six, did dress in blue, wearing a black coxcomb and brown shoeth; but not losing sight of fiction eith'r—that the lady is a vessel in which all s'rts of spirits and f'rces art coursing and flashing p'rpetually. the moment, howev'r, yond one tries this method with the elizabethan mistress, one brancheth of illumination fails; one is did hold up by the scarcity of facts.   one knoweth nothing detailed, nothing p'rfectly true and substantial about h'r.   hist'ry scarcely mentions h'r.   and i did turn to professeth'r trevelyan again to seeth what hist'ry meanteth to that gent.   i hath found by looking at his chapt'r headings yond t meanteth.