say Hi or Bye

say 'Hi' or 'Bye'? Which one I prefer. None of them.
Why? Normally people may prefer to say 'Hi' rather than 'Bye'.
Saying 'Hi' represents a beginning, while saying 'Bye' represent an end. Is it?
However, 'Hi' and 'Bye' both are one. Without 'hi', saying 'bye' will no longer has its own meaning and vice versa. ^^
Having no sorrow to say 'Bye'. Instead, having hope to long for the moment for us to say 'Hi'.^^