One of the main advantages of being the only child is that your parents pay attention only to you. You are the most important person in their lives. Parents do everything for you. For example, if you want a new toy or some clothes they go to a shop and just buy it for you. Moreover, you have everything for yourself. You do not have to share the room, the computer and any other things. What is more you get more presents or more money. In addition to that, there is no person to quarrel with. You are alone and no one can take your things and do something wrong with them. No one disturbs you. You are a family 'pet' and you get all parential love.
On the other hand there are also some disadvantages. First of all, the only children are very spoiled and selfish. They are used to thinking that they are the most important people so they must have everything only for themselves. When something is not going according to the way they planned it, they get angry. But it is not all. Being the only child means that parents put preassure on you. You have to still prove that you are the best. You have to het a A for every classroom test otherwise your parents will be disappointed with you. Last but not least, the only child may sometimes feel lonely. Other children can go out with siblings - for example to a disco, to friends or even to school. The only child must go solitary or with friends, although it is not the same. They have nobody who can borrow them some clothes or other things.
To sum up, being the only child has many advantages but also a lot of disadvantages. Being such a child can be good, although in my opinion these people feel lonely and sad. Personally, I do not want to be the only child.