I never sleep any where in the world like I sleep in the room that I grew up in with the sounds of mini-buses, taxis, buses, the movements of people upstairs (or my Mum still on the computer or watching TV into the wee hours), and the loud conversations of the downstairs watchmen with each other or various tenants in the block as they return home.
Silence to sleep? NO WAY!! Give me the sounds of my bedroom in HK and I'll sleep like a baby ANY day!!!! :)