If I had a choice I would play the Empire, but only because the bad guys always have the better looking costumes and weapons.
However, I could not be happier with the direction FFG is taking with the Star Wars LCG. I love to opportunity to play Co-Op. My opinion has been reinforced by the amazing job they have done with the Lord of the Rings LCG. The incredible amount of effort they put into making you feel like you are actually travelling through Middle Earth is just great. And I can't wait to see how they can pull me into the Star Wars universe.