Courtesy of the Earthenwitch, who supplied the question, here are mine.
1) The AC when he giggles in his sleep.
2) "Hey you" as spoken by R in his low and affectionate voice.
3) the bread machine whirring.
4) the 'busy hum' of my children working
5) a V8 engine.
6) a class 60 diesel locomotive powering up.
7) loud rock music
8) quiet classical music (mainstream I'm afraid!)
9) The silence of a Saturday morning in the house.
10) The door opening as someone comes home.
Works for me.
What about you?