My son giggling and my DW laughing. They do that so much more when we're camping and it warms my heart and brings a broad smile to my face every time, especially when they don't know I'm listening.
The pop of a real wood campfire (we don't get that very often any more, so it's a bit of a treat), the soft call of a far off Mourning Dove at sunset, crickets and tree frogs as they croak and chirp through the night. I'll even take a cicada call if it's far away (up close, they're kind of annoying though). The whoosh of a Coleman propane lantern turned way down low. The screeches and hollers of kids in the early evening playing some game they just made up just before mom and dad call them in for dinner. The sound of the waves washing up on the beach and the gulls as they "laugh" at each other over the one crab they all want to eat.
Old ones I don't often hear any more: the boat motor when we'd fire it up at the boat launch, and the gentle lapping of waves against the hull as we fished until the sun went to bed and after. Then the soft breeze as my dad idled the boat back to the ramp to put in for the night.
Least favorite: the sound of the tongue jack and electric stab jack motors coming up; that means we're hitched up and heading out.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!