Sadness and playfulness are the worst for me. The sadness over something very trivial is annoying, "Just get over it already!" And when an elder friend dies, I get 2 days of this crying, sobbing in bed, GAH! The only good thing about sadness, is it produces some great paintings and sculptures, same with playful, but that's the only good things about it.
The playfulness emotion is scary because I have seen what it leads to! First playful, then very playful and then hysterical, and then death. Nope, not going to let playful get past very playful...it gets deleted post haste!