No particular order :)

• Sleepy mumbling
• Thunder and rain
• Typewriter
• Mechanical keyboard strokes
• Plucking a guitar's strings
• Slow piano melody
• Cat's meow, purr, and snoring
• Pen clicking
• Fire crackling
• Beatboxing
• Yodeling
• High heels on a smooth surface
• The "ahh" sound after someone drinks a cool, refreshing drink
• Crinkly sound laminated library books make when you open them