I always thought Breakfast at Tiffany's was a happy story. It is actually very sad but a good read. I found it confusing at first though.
House of Flowers was an interesting story as well. I didn't enjoy A Diamond Guitar very much because I found it boring. My favorite story was A Christmas Memory. It is currently 16 ubtil Christmas so I feel the anticipation of Christmas just as the main characters did. Even though the ending is predictable it is very sweet and touched my heart.