Because Destiny Says So:Characters want to fullfill a prophecy.
Because You Were Nice to Me: One character is loyal to another due to a single kind act.
Career Building Blunder: When an early mistake provides the motivation for a character.
Chronic Hero Syndrome: Character is compelled to help everyone, all the time.
Community-Threatening Construction: When a planned construction site motivates residents to defend their home which is subject for demolition.
Concepts Are Cheap: Characters have vague one word motivations that could really mean anything.
Darwinist Desire: A character wants to reproduce with the fittest mate possible.
Debt Detester: Character repays debts as soon as possible so as to not owe others.
Declaration of Protection: A person has their entire motivation built around protecting a vulnerable person. (usually a girl).
Desperately Looking for a Purpose in Life: A character on a journey to find a meaningful place in the world.
Despotism Justifies the Means: Bad guys who want only power will do anything to acheive it.
Dismotivation: Characters try hard to achieve nothing.
Driven by Envy: A character wants something someone else has, and resents them for it.
Dystopia Justifies the Means: Bad guys whose goal is to create a nightmarish crapsack world.
Embodiment of Virtue: A character is driven by the desire to achieve perfection in a certain moral virtue.
Enemies Equals Greatness: Opposition or mistreatment from others is what gets a character highly motivated to do great things.
Everyone's Baby Sister: Threats on a character that everyone cares about gets characters to act against the threat.
Failure Knight: A character failed to protect someone once, and is determined not to fail again.
Family Honor: A character wants to live up to their family name, and bring credit to their family.
Fighting for a Homeland:
Food as Bribe: Some people will do anything for food.
For Great Justice: Good guys fight so that Justice will prevail.
For Happiness: A character wants to spread joy and cheer.
For Science!: A character wants to make scientific discoveries with no real practical purposes.
For the Evulz: Bad guys do evil because they love evil.
For the Funnyz: A character makes a joke, usually against their own self-interest, because they love jokes.
The Four Loves: A character searches for love, in any form.
Freudian Excuse: Something in a villain's past causes them to act the way they do, often parental abuse.
Glory Seeker: A character wants other people to consider him/her to be a Badass.
Goal in Life: A character's main motivation through life.
Gotta Catch Them All: A character wants to pursue a collection.
Hidden Agenda Villain: They have a motive, but we're not sure what it is.

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Designing Your Character & Other Handy Things
RandomCharacters are hard to create. So consider this book a giant cheat sheet of all your writing needs. This book not only helps writers create their characters, but is a menagerie of descriptions for your stories: Smells. Sounds Instead of Said Describ...