For an alignment-free setting, I decided to go with only 5 types of dragon. Black, Bronze, Green, Red, and Silver.
Those are the cool ones anyway.
Blue, Brass, and Gold always seemed stupid and White is kind of lame.
In some supplement at some time there were cataclysm dragons. They were like the living incarnation of natural disasters, powerful beyond mortal ken and instilled with the fury of creation and destruction. I always loved that concept, and wanted to do a truly epic 4E fight with one of them but never had the chance.
Taking on a dragon is cool. Taking on a dragon who is the literal embodiment of an earthquake, or a volcanic eruption, or a tsunami, that is priceless!
Who got 10 alignments?