Some people prefer to use 2004 for its simplicity, and to relive the "good ole days". I still use it sometimes, for rollingstock that wont run on later versions. I have also returned to 2010 because it is able to run a lot of older content in compatability mode. I sit back and have a gigglre at all who have had so much trouble with 2012 and SP1. I may be an old fogey but I still think sometimes the good old days were the best,
Cheers, Mike