I agree with so many of these (sadly I don't live near the sea.) Mine are:
Hearing the rain lash against the windows as I'm reading my book.
A cup of tea in bed on a lazy morning.
Hearing DDs laughing together. DD2 has a proper belly laugh and it warms my heart.
The smell of the garden after it has rained.
Standing on the lawn with bare feet.
Watching the birds wash in the bird bath.
A candle quietly crackling.
A soft, warm blanket on top of the duvet on my bed in the winter.
Being in the bath with only a candle for light listening to Classic FM.
Stirring something that's bubbling on the stove with a glass of wine in hand, listening to the radio.
A Friday night G&T with DH, music playing after DDs have gone to bed.
Dancing in the kitchen.