"For me, a good teacher would be patient, friendly, optimistic, happy and well-organised."
I'm sure there are good teachers who are none of those things!
I would like to point out though that if the question is actually worded "What are the qualities of a good teacher?" then the answer should comprise a list of qualities (nouns).
"The qualities of a good teacher are patience, friendliness, optimism, happiness and
good organisational skills."