My buddy and I just started Tatooine and we both agreed that it felt like a breath of fresh air after the concrete canyons of Nar Shadaa (which IMO was too similar to Coruscant.. And was Shadow Town meant to look like a high security prison when you could just walk straight in?!).
The novelty of our new speeders, the whole look and feel of the blinding, desolate desert and the run-down settlements is great. The Czerka quest is a cut above the usual stuff. It's been my favourite planet so far after Taris