By Jeff Okamoto, Sandy Petersen, and lots of others
The whole thing started around 1983 or so at a party at Pacificon at the Dunfey Hotel in San Mateo in which the idea came up of classifying the different styles of roleplaying. They came up with four different types, which are explained below. Special credit goes to Perry Caro, Chris Guthrie, Rick Heli, Robert Allen, and Ken Kaufman, to name a few.
The Real Man: The tough macho type who walks up to the attacking dragon and orders it to leave before he gets hurt.
The Real Roleplayer: The intelligent cunning guy who tricks the constable into letting you all out of prison.
The Loonie: The guy who will do anything for a cheap laugh, including casting a fireball at ground zero.
The Munchkin Need we say more?
Real Men think they're brothers in arms.
Real Roleplayers hide behind them.
Loonies harass them with stupid suggestions.
Munchkins say "I'm a Real Man, too!"
Real Men protect them, on the off chance they may come up with something useful.
Real Roleplayers sigh with relief to know they're not alone, and then get their characters involved in love affairs and death feuds.
Loonies harass them with stupid suggestions.
Munchkins say "I'm a Real Roleplayer, too!"
Real Men ignore them.
Real Roleplayers sometimes harass them back by taking a stupid suggestion and making it work.
Loonies declare a pie fight at 20 paces . . . and cheat.
Munchkins try to imitate the jokes, and fall flat.
Real Men attack them on sight.
Real Roleplayers trick them into being cannon fodder.
Loonies make reasonable-sounding suggestions that will get the Munchkin killed in an amusing way.
Munchkins query, "What's a Munchkin?"
Real Men think there aren't enough combats
Real Roleplayers like the setting
Loonies like the myriad of possible spell effects
Munchkins think magi aren't powerful enough.
Real Men like the Crusades
Real Roleplayers like the richness of the paradigm
Loonies like mendicant monks
Munchkins like being able to look up the answers
Real Men like _starting_ with battle-worthy wizards
Real Roleplayers like the long-term character development
Loonies like the chance to make the Crown-prince think he's a slug
Munchkins like being able to spont level 80 spells
Real Men think the Code of Hermes is too restrictive
Real Roleplayers think there aren't enough flaw points to define their characters
Loonies think there aren't enough ways to pull pranks on the mundanes
Munchkins think longevity potions don't last long enough
Real Men join House Flambeau or House Tytalus
Real Roleplayers join House Jerbiton
Loonies join House Criamon or House Merinita
Munchkins join House Bjornaer
Real Men don't do variant magi
Real Roleplayers play Shamans
Loonies play Faerie Companions
Munchkins play Diabolists
Real Men have an affinity with Ignem or Perdo
Real Roleplayers have the Gentle Gift
Loonies have Withstand Magic and Berserk
Munchkins have Heartbeast - Great Worm of the Pyrenees
Real Men take Fury
Real Roleplayers take Sense of Doom
Loonies take Magic Addiction, Lack of Concentration and Chaotic Magic.
Munchkins don't understand the concept
Real Men kill their Enemies
Real Roleplayers join monasteries
Loonies use self-flagellation
Munchkins seem to have lost that bit of paper
Real Men play crusading knights
Real Roleplayers play wandering friars
Loonies play time-travelling Californians
Munchkins play Richard the Lionhearted
Real Men find it too fiddly, and stick to the library
Real Roleplayers take familiars and apprentices
Loonies use experimentation with vis
Munchkins invent 'Cleanse the Verminous Infestation of People'
Real Men cast Pilum of Fire
Real Roleplayers cast Frosty Breath of the Spoken Lie
Loonies cast Confusion of the Insane Vibrations near a clifftop
Munchkins cast Opening the Earth's Pore
Real Men like Penetration
Real Roleplayers like Guile
Loonies like Scribe Pig-Latin
Munchkins like Affinity - everything
Real Men like open-ended die rolls
Real Roleplayers like personality traits
Loonies like botches
Munchkins like spontaneous magic
Real Men say "I kill demons and eat them for breakfast."
Real Roleplayers say "How can you believe him? He's a Christian!"
Loonies say "I healed the dog. I took his toe nails."
Munchkins say "Certamen!"