Different speeches affect different people. The type of person you are and the things you are into determine if you will like a speech.  If you like/ support the Black equality movement the you should appreciate Martin Luther king Jr.'s I have a dream speech.  Or if you like rocky and motivational speeches then you will like rocky's speech.  This is because you will only remember, retain, or be effected by a speech that you enjoy and get your mind focused on.  The speaker also has to be able to focus on that certain topic and be able to hold your attention so it will effect you.  If he doesn't then you will not like it or want to hear anymore.