One thing I love is that nearly every time Lucas went back to a planet, he brought us something new. Tatooine is in 4 of the 6 movies (ignoring the "Harry Potter" scene in ROTS); Coruscant is in 3 of the 6 movies (ignoring the celebration at the end of 6, though that technically was the first time we saw it) and every time we re-visit those planets we got something new. We went back to Tatooine in 6. We saw Jabba's palace (including the dungeons, and the rancor), and the Dune Sea with the Sarlacc pitt. We saw it again in 1, and we saw Mos Espa, the slave hovels, junk dealers, the pod race. We went back again in 2 and we saw the search montage and the Tusken camp. When we saw Coruscant again in 2, we not only got to see Padme's apartment, the streets, the traffic, the night club, and Dex' diner, we also saw more of the Jedi temple (the library, the hangar), and more of government (Palpatine's office). In ROTS, we got the opera, the military hangar, and extended looks (extended sets) into Padme's apartment and Palpatine's office. And I think that's pretty cool.