Dwarfs, sounds strange? Midget? Or is that degrading?
Anyway, I did forget about them... However, generally I miss the diversity of NPC animations from F1/2. They made the whole more credible and alive, even though they were so small and weren't 3D
I miss the stumbling old man/junkie. The ass-shaking prostitute/lady. The slow but deliberate moving ghouls. The Reno bouncers. The tough looking hulking brotherhood. The satisfying death scenes...
edit:in a nuclear holocaust way of speaking there should, or at least could, be more genetic implications in the fallout universe. So dwarfs, yes, definitely.
NPCs could be more scarred from living in RAD-ersive world.