Some of my favorite sounds:
Children playing in the schoolyard across the street.
A friendly hello
Waves massaging the shore
The kree-eee-ar of a red-tailed hawk.
Rain (when I’m inside, reading a good book by the fire)
A cat’s purr
A ‘real’ voice on the phone
A bubbling brook
The car engine starting when I absolutely have to be somewhere
Baseball cards in bicycle tire spokes (a sound I haven’t heard in decades)