I liked to name my MMO characters "Thatguy(numbers)", "Guess(numbers)", "whatshisname(numbers)", "Who(#s)", etc. (people usually left out the numbers added on the end) Yes, it's based on this, which was based on a bit by Abbot and Costello.
Hell, not like parties were assembled quickly anyway.
Trying to come up with a more ridiculous name than my previous capture was my greatest challenge in any pokemon game. I stopped playing when I realized it was the only one that interested me.
There was one funny moment in Morrowind when I was eventually caught by the not-yet-psychic police force, "You broke the law, Dumbass!"
In Animal Crossing, (one of them, anyway) a townsperson would occasionaly ask the player for a catch phrase to be used after every sentence. Being that I was trying to assert a facist military state on the critter population involving daily net-beatings and holes dug around houses, I went with Master. "Good morning, Master!" "Look at the cherry blossoms, Master!"
In Twilight Princss, I once went with "..." so it looked like everyone was zoning out all the time, made even more hilarious when a character shouted my name in a dramatic moment.