Fantasy is AMAZING!!!! But I love Sci-fi too. But then again...I usually mix up the two genres, because they're so awesome!! But I chose fantasy, because I usually write fantasy, therefore, it wins. Lol.
Both, often overlapping or just flat-out melded together. A young lad must take up his fallen father's sword and learn the ways of power from a mysterious old wizard in order to become the most rare and powerful of knights... Yup, it sure worked for Star Wars.