I saw this mentioned somewhere before (not sure if it was here), but I noticed some interesting symbolism with Tatooine's binary sons. First, Anakin in AOTC. As he is searching for Shmi, we see him with the setting suns in the background. When those suns rise again, Anakin has began his journey along the dark path. Next, Luke in ANH. He stands outside and watches the suns set. The next day, he has begun his journey to become a Jedi, and ultimately, redeem his father. Also, the music seems to parallel this. The music score is identical until it splits into Duel of the Fates for Anakin, but kind of mellows out for Luke. This is indeed interesting, if it is in fact intentional.