Characters are passionate people who live unique lives. Middle-class fashion, there are clothes beyond jeans and the drab suit and tie. Look at fashion shows and awards, travel videos and documentaries for ideas. Educate yourself in what people wore long ago and will wear in the future. Think beyond your closet.
Language is big and is usually very telling of a person's background.
Some people can't read, never mind recite poetry. Many avoid newspapers and books while others read everything from cereal boxes to classic literature. People vary on many levels. When writing give a solid view of your character's world. Show her avoiding certain areas or commenting on things she sees.