Sadness or any other "blue" emotion such as loneliness, hopelessness, or any kind of depression.

I would take anger, hatred, or malice over sadness or hopelessness. At least, if I am angry, I am stronger and more motivated to do something about whatever upsets me. Additionally, being angry feels a lot better than being sad.

Sorry, sadness is for the birds. If I am sad, I do whatever it takes to force myself to either feel anger or nothing. If I am at home and feel lonely or sad, I play a music playlist full of death metal, heavy industrial, and agrotech to stimulate aggression in myself so that I don't feel sad.