By 18, the best thing that you are completely free. You can do what ever you wanted to do. In addition, in my country you are allowed to drive when you are at the age 18 and above so it means drive to where you wish. But, there is a common disadvantage at this age which is bankruptcy.

 For example, last week I and my friends decided to go to watch a football match at the stadium  but when we get there I realised that I didn't have enough money to pay for the tickets so I had to go back home because all of my friends where carrying a few money with them.