I think there should be all of them but on different types of servers. personally if you really like dinosaurs that much maybe you should play a different game because this is a survival game with guns and airplanes. I think dinosaurs are NOT a good idea think of how many players rust will lose. I have no problem with you guys liking dinosaurs but dinosaurs will attract a LOT of little kids. Dinosaurs just wont fit in with cavemen, guns and planes.
While I agree that dinos don't really fit in, Cavemen, Guns and Planes don't really fit together either, do they? :p