5 things I like to be forced to overhear people doing: 

1. Complaining about work, life, family, money, stress, etc.
2. Burping, farting, or other bodily functions not followed by laughter.
3. Talking about personal and medical problems like weight loss, relationships, bunions, menopause, OBGYN, urology, stones, etc.
4. Spouting out misinformed and uneducated opinions about politics, religion, movies, music, etc.
5. Nose-blowing, throat-clearing, loogie-hocking, or any other mucus-related activity.