I would walk around book stores and dream in the science fiction section. I would imagine I could travel in space and visit some of these worlds depicted in the cover images. Sometimes the covers bore no reflection of the story and some did, like the good old War of the Worlds.
I just love anything that provides the fantasy of escape from the world I live in. I'm not complaining, my life is great. I just sometimes think escaping into these books is wonderful. The images on the front cover are compelling. They make me pick up the book and read the synopsis.