Most coaches and players do not enjoy interacting with the media. They know if they come in angry or too elated, there is the possibility of creating an unfortunate memory that will be publicly available forever.
Normally, great means better than good. The subject of the adjective has a transcendent quality that lifts it above all others.
However, there are other interpretations.
Occasionally, something is great because it is interesting, funny or just plain weird.
Enjoy these great moments in NFL press conference history.