I can't stand 3 Dog. I liked him at first but it's just constant "Did you here what that kid from Vault 101 did today?" "Man that Vault 101 kid sure is an asshole for blowing up Megaton!" "Did you here the Vault Dweller took out the facility at Raven Rock, you go kid!"
Mr. New Vegas only mentions you twice in the game. The first when he mentions that you survived a gunshot to the head, and if you stop the monorail attack he compliments "an external advisor".