There are big angels and small angels, serious angels and joyful angels. But no matter their personalities, they are a very old, very important aspect of many of the world's religions.
However, most western angels were considered sexless and ageless. They were, interestingly enough, wingless until the 4th century AD. John Chrysostom explained it thus: "They [the wings] manifest a nature's sublimity. That is why Gabriel is represented with wings. Not that angels have wings, but that you may know that they leave the heights and the most elevated dwelling to approach human nature. Accordingly, the wings attributed to these powers have no other meaning than to indicate the sublimity of their nature.