I play both. I collect Tau Empire/Imperial Guard figures (though I only ever played 1 game with my Tau, it's just too inconvenient to drag my stuff to the store and I don't know anyone there anyway) mainly for the modeling/painting. I'm also a huuuuge fan of the lore, having collected dozens upon dozens of books about 40K, ranging from short stories to artwork collections. As for the Dawn of War games, I have all the expansions for the 1, but none of those for the 2. I'd have to get working on that soon. I was also planning on maybe starting a Battlefleet Gothic fleet, but I'm still unsure about that. I have a blog (in french) where I dump all the pictures I take of my miniatures. It's the "homepage" link below my profile pic.