Well, since you asked...
Dragons - Dragons shouldn’t be used carelessly (hey, anyone see where I left that dragon…), but they definitely should make an appearance now and then. I agree with the idea that they can be a major NPC in a multi-arc, perhaps even sending their own acquisition teams out in competition with the Pathfinders and Aspis. As an alternative, if a scenario needs some muscle, then it should probably send in a drake instead to make sure that dragons aren’t overused or watered down.
Goblins - I have a soft spot for goblins, so I will always approve of more :-) Hmm, maybe time to dust off We Be Goblins again for the troops…
Orcs – Yeah, I think orcs should get some more spotlight time. A daring Pathfinder recovery mission in the middle of a skirmish between orc tribes and Lastwall cavalry could be exciting.
Drow – I have nothing against them but I was never excited by them. Could be useful as a foil for elven pathfinders though.
Dinosaurs – I think used sparingly they could be the focus of a Lost World type arc.
Undead – Good foot troops. Cleric has to choose between turning or saving the healing the later. But can definitely be overdone. I always preferred the image of the skeleton clawing its way out of the ground rather than the zombie horde. Intelligent undead would make another good choice as villainous multi-arc NPC.
Swarms – I feel they should be used to add spice to an encounter (flame the bugs or hit the gnome barbarian?) rather than be the focus.
Outsiders – A good enemy for the Silver Crusade pathfinders. Again, used too often takes the mystery away.
Humanoid NPCs – Well, they should common when adventuring in more civilised areas. And it gives more roleplaying opportunity than usually found when crossing the territory of the dreaded stenchbeast. But too many human-centric organisations can get boring.
