Oh yeah, Fallout has plenty of little things that make the game good. While some people are running around just doing the story line and shooting supermutants with a gatling gun, some of us take the time to explore the little things in our environments. Taking an idea from a brilliant friend of mine, "Signifigance is the only thing that matters in the world. It comes in the smallest of packages and it can be anything, anywhere, at anytime."
So here's some things that I enjoyed:
Finding the long since ghoulified Chinese Army spy and his dead, skeletal partner, with a gun gripped tightly in his hand. What did this tell me? Two men faced with a challenge took two different routes. One chose the easy way out, the other, forced into an enternity of ghoulification... Until I put a .44 in his head, ending his miserable existance. Just doing him a favor
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Then there was the downed Chinese plane with a Chinese Ghoul weilding a Chinese Assault rifle. Now that was my first surprise, besides the radio signal. The second was the entire factory full and their leader, who carried a sword.
What possibly could've been the president's body (or Ghoul) in the remnants of the White House.
The bodies of the scientist and the Never-was-Vault Dweller outside of Vault 87. The scientists radiation suits are still there along with a small supply of Rad-X and Rad-Away and the skeleton of a man in a tattered suit and a briefcase holding some clothes, he was there when the bomb was dropped and was about to enter the Vault. Spent all that money just to die at the door.
The teddy bear that, when taken, enrages a nearby Super Mutant Behemoth and causes it to run at you and attack. It shows it has some form of attachments and intelligence.
Mr. Crowley. First thought that came to mind was Ozzy Ozbournes song "Mr. Crowley" then this,
http://en.wikipedia.org/wiki/Aleister_Crowley <--- Aleister Crowley. Just read the first paragrpah and understand.