I have a particular interest in the design of teen spaces.  I can't help imagining how exciting reading at the library would have been for me if spaces had been visually stimulating and fun to be in a century ago when I was young! 

 I am so excited by spaces like the teen space at Phoenix.Teen Central Burton Barr Library, Phoenix

Here is a great article out of the American Libraries on line Mag.  I would go one step farther than the view taken about the timing and level of involvement in the design process that is represented in the article but it's a place to start a conversation.  I advocate direct involvement from the get go and that lasts throughout the design process.  Designing space for children and teens