I actually thought of a ridiculous concept for an mmo, not so much an mmo, but a response to my frustrations with World of Warcraft, and how the most play race was human and the most played class was warrior. You know the one combination that you can actually be in real life, human Warrior.

It gave me an amusing thought, then if I ever ran a fantasy-based mmo, there would be absolutely no human option, and no realistic class options, like you wouldn't be able to pick a class that you could definitely do in real life.

And the first major expansion would introduce the scientist class, and be all about humans finding this fantasy world. And just make that the main selling point you could play as boring Mundane Human doing real world stuff. Just a little social experiment to see how people would react... The humans would definitely have a mad scientist vibe, so it wouldn't be completely boring.

Dragonriders of Pern - the game.

Awww, I always kind of felt bad for that person. Hilarious though.