I was Dx follower for long time, until I got a great deal for D3s and You know what: it gives You a lot of new possibilities, even when You shoot animals, like I do. It makes You to think twice about composition. On dx it was easy - just fill the frame with animal, while it worked for some shots I'm starting to see the beauty of showing not only the animal itself but also the habitat the animal lives in.
Below are two examples of fx vs dx.
on dx I'll more likely go for picture similar to the one below: