Riddle: I hurt the most when lost, yet also when not had at all. I'm sometimes the hardest to express, but the easiest to ignore. I can be given to many, or just one. What am I?
Riddle: I can bring you joy or sorrow, or everything in between. None have seen, smelt or felt me, yet many still know what I am. I have many types, but I am really just one thing. What am I?