I love the 2005s and most of my dolls are from the collection, but 2006 was also a great year. Those Atlantis outfits are incredible! I don't care for 2004 or 2007 since the dolls look a bit too generic in terms of there not being that extra little bit of "fantasy" to them. The 2003's are still the BEST dressed.
And 2008... wow, wow, wow!
My fave years are 2003, 2005, 2006 and 2008. I have dolls from all those years or will in the next couple of months!