I really wish I could pick 2004, 2006 and 2007 at the same time, all of them had such a great LEGO feel to them, but 06 takes the cake, due to the builds themselves, the 6209 Slave I and the fact that all but one of the sets are Original Trilogy. The worst year for me is 2011, all it was for me was poorly designed overpriced sets that put exclusive figures in them. Every set that year felt like an overpriced battle pack, of course with the exception of the battle packs and the 7965 Falcon.