Re-Learning to Crochet

New to my hobby list is "re-learning to crochet! My Great Grandma taught me when I was a child. I have such fond memories of her. I figure a good way to quiet some of my "multi-tasking obsession" would be to crochet when I treat myself to some movie and/or DVR watching time. I am hoping to be able to follow some "square" type pattern and then put the squares together in an afghan project. What's easier for a 'repeat beginner'...a granny square or some other type of pattern to form a square?