Now I have read all of this series, I can safely say that SANDMAN is my favourite graphic novel/comic book series. Endless Nights sees Neil Gaiman return to his cast of 'the Endless' (Dream, Death, Despair, Destiny, Desire and Delirium, and their renegade brother Destruction) and tells a story about each of these characters with a different artist for each one. 
 My personal favourite was "Dream: The Heart of a Star" drawn by Miguelanxo Prada. It has a mysterious, kind of happy/sad atmosphere to it, and Miguelanxo's art lends it a - well, dream-like quality, but the sort of quality you get in a dream where you know you are dreaming. I also loved Sol, he was my favourite star. I wanted to take him home and feed him porridge. (I don't quite know why - he is just very sweet. For a potential gas giant.)