Dogmeat was always so much fun. Especially how the dog charged "Lou" just to get split in half by a laser. HA!
Then I go "You killed me dog, dog!" And open up my turbo charged plasma rifle and shoot him in the eyes, killing the smeghead with one hit. Then scream at him "DIE MUTHA****" as he dances his death dance.
Man, we better get called shots and uber death animations out of Fallout 3.