TOS gave us Vulcans, Romulans, Andorians, Tellarites and Klingons. TNG gave us Betazoids, Zakdorn, Trill, Bajorans, Cardassians, the Borg, etc. DS9 gave us the Dominion and the Prophets as well as many ohters. VOY gave us Hirogen, Vidians, the Hoth, etc. ENT gave us Aenar, the Xindi, etc. Of course all of these make up a partial list at best (and doesn't even mention TAS or the movies). My question is--what kinds of aliens would you like to see in a new Star Trek? What roles would you like to seem them play in such stories, and why?