"If anything, the overriding emotion is gonna just be excitement"

In this quote, Christa McAuliffe is revealing her belief that the dominant sensation in a particular circumstance will be enjoyment. She is implying that there might be other feelings present, however excitement will be the most prevalent. This might be interpreted as a favorable outlook on the scenario, as enjoyment is often related to anticipation and delight. McAuliffe's use of the word "overriding" suggests that enjoyment will eclipse any other emotions that might develop. In general, this quote communicates a sense of optimism and interest, highlighting McAuliffe's favorable mindset and outlook on life.