What would be the hardest thing for you to go without for weeks if need be?

For you what would be the hardest to go weeks or months without, alcohol, driving, sex, smoking, meat, or watching TV? I know people who have habits such as smoking and it would appear if they had to give up something like driving or sex that they might have cigarettes everyday when they needed it they would. Some people it seems to be food. What is your Achilles’ heel, what could you simply can’t do without for long durations of time, or doing so would leave you very grumpy, annoyed or depressed?