People can develop addictive behaviors or tendencies towards various substances, activities, or even people. Here are some common examples:

1. **Substances:**
- Alcohol
- Tobacco/nicotine
- Opioids (heroin, prescription painkillers)
- Stimulants (cocaine, methamphetamine)
- Hallucinogens (LSD, psilocybin)
- Cannabis

2. **Activities:**
- Gambling
- Video gaming
- Internet use/surfing
- Exercise (exercise addiction)
- Shopping
- Work (workaholism)

3. **Behaviors:**
- Binge eating or anorexia
- Self-harm
- Risk-taking behaviors

4. **People:**
- Codependency in relationships
- Infatuation or obsession with someone

5. **Other:**
- Pornography
- Sex

Addiction is complex and can vary widely from person to person. It often involves a combination of genetic, environmental, and psychological factors. If you or someone you know is struggling with addiction, it's important to seek professional help.