This usage describes physical spaces that receive a lot of sunlight, making them bright and warm. It is often considered desirable.
This room is sunny in the morning.
They prefer sunny rooms for relaxing.
This meaning of 'sunny' refers to a person's mood or character, showing joy and happiness. A sunny person tends to make others feel good.
He has a sunny personality.
She always has a sunny smile.
In this sense, 'sunny' describes someone who expects good things to happen. It contrasts with a pessimistic perspective.
He has a sunny view of the future.
Her sunny outlook keeps us motivated.
