-Heavy liquid being poured down - that gulp gulp gulp sound it makes as it falls.

-The sound you hear when you're underwater (sort of like muffled noise).

-People (crowds) whispering, especially if this intensifies from murmurs to concern with ohhhs and ahhhs. It's odd I like this because I hate crowds and don't go anywhere crowded like game stadiums or music concerts.

-Screeching wheels (on tarmac or gravel)

-Angry or excited dog constantly barking and snarling at close range

-The sound of a dot matrix printer

-A restaurant being prepared for business (waiters engaged in casual banter, cutlery being set etc)

-Heels clicking in a hallway

-Burning tobacco at the end of a cigarette

-Dry leaves crumbling

-Thunder (far away and close range)

-live electricty

and as someone else mentioned: Wood cracking in fire