My criteria here for what constitutes "pointless" is anything that isn't directly beneficial to helping you succeed at the gameplay.
In Castlevania: Portrait of Ruin, you play as two characters that you can switch between at will (One's a physical fighter and the other is a witch). The pointless thing I like to do when playing it is rapidly switch between them because whenever you swap they say their names, so I just hear, "Charlotte! Jonathan! Charlotte! Jonathan! Charlotte! Jonathan! Charlotte! Jonathan!" over and over again. The way they say their lines just has a nice rhythm to it.
In Castlevania: Portrait of Ruin, you play as two characters that you can switch between at will (One's a physical fighter and the other is a witch). The pointless thing I like to do when playing it is rapidly switch between them because whenever you swap they say their names, so I just hear, "Charlotte! Jonathan! Charlotte! Jonathan! Charlotte! Jonathan! Charlotte! Jonathan!" over and over again. The way they say their lines just has a nice rhythm to it.