SF is my favorite game of all time, and SW is my favorite movie of all time. They're both similar in so many ways. One title revolutionized their industry, they had special editions, they had prequels, and so on.
If SFII was my favorite game, then Episode IV would be my favorite movie. But SFII is not my favorite game, Alpha 3 is. Alpha 3 was the third prequel, so it's perfectly understandable that Episode III be my favorite movie.