Seeing how many Enclave heads I can stick to walls using the Railway Rifle.
Also using the Mez trick to turn the Ghouls in the Gypsy village friendly, It fits one of my characters since Story wise he was raised by ghouls.
Using the Mez Trick to turn every Respawning raider friendly, just for a couple of my raider characters
Not running.
Not heading straight to Megaton and instead walking in another direction, just did this today and wow I actually found places that I never seen before, and since I never ran, only ran during fights, I actually paid more attention to my surroundings.
Playing a Average Joe character, very fun.