Dreams

I have dreams every morning. As the sun rises and the birds wake, I lay in bed asleep. Though not completely asleep. My mind wakes bit by bit and wanders. I have dreams that are beyond scary. I have dreams that feel a whole lot scarier than they are. I have dreams of mundane and silly things. My emotions get tied to my dreams and I awake still anger, upset, or happy. Haven't had too many happy dreams though. Why is that? Who has happy dreams? I wonder if there is a requirement for what one needs in order to have a good dream.