Fatal Flaws

Don't know what to put for your character's fatal flaw? Well, here's a few examples that you can look through! 
The biggest thing to note about Fatal Flaws is how much stronger they are than normal weaknesses. Say your character has a weakness of Arrogant - they may act posh and overdone and maybe even a bit egotistical in situations or conversations. A fatal flaw of Arrogance means they will blindly charge into a situation that puts their life at risk because they feel they can handle said situation, particularly if it's out of their control. This isn't meant to pigeon-hole you into situations, but it should always be something to take into account with your character. Fatal flaws also aren't something your character can "overcome", they are major and constant weaknesses to your character. 
Thank you to Saturn for putting this document together!
“It is a flaw which causes an otherwise noble or exceptional character to bring about their own downfall and, often, their eventual death.”
Narcissism - Overly interested in yourself and/or your physical appearance.
Hubris - Excessive self-pride and/or confidence.
Self-doubt - Having excessive doubt in your own abilities.
Arrogance - Having an exaggerated sense of your own importance and/or abilities.
Excessive Curiosity - Having an excessively, or overly, curious mind
Irresponsibility - Not having the feeling of proper responsibility.
Greed - Having excessive greed.
The Heroic Desire to Save People - The desire to save people, putting them over yourself.
Personal Loyalty - A personal desire to do anything for those close to you.
Impulsivity - Having an excessive desire to do something, without thinking it over first.
Blind Trust - To trust someone you don’t know, putting excessive trust in them and their plans despite not knowing them much.
Self-Sacrifice - The desire to sacrifice yourself for a cause, even if there’s the chance that you can survive without sacrificing yourself.
Cowardice - Being excessively cowardly, not being able to do much without breaking down.
Childishness - To act like a child, despite not being the age of a child.
Disloyalty - Having an excessive disloyalty to people around you, not doing much for them at all, and to not trust anyone, even close friends.
Gluttony - Overly excessive greed, in either, or both, food or something other than food.
Gullible - To be able to be easily convinced or persuaded, usually to believe something.
Martyrdom - Voluntarily suffering for the sake of a belief or others
Impatience - Being excessively impatient, not being able to wait long for something.
Self-Destruction - To have a behavior that can cause excessive harm to yourself, in a non-physical sense usually.
Self-Deprecation - The extreme feeling of not being good enough to do something.
Stubbornness - Being too focused on one thing to introduce a new idea to your mind.
Inferiority - Feeling lesser than others 
Laziness - Being too lazy to do anything, often being excessively lazy.
Short-temperedness - A temper that’s often easy to set off.
Procrastination - Different from excessive laziness in that one will do something else in order to avoid doing a specific task.
Perfectionism - The need to have everything perfect.
Attention Seeking - To seek out attention through any means, even means that may harm others.
Envy - Being excessively jealous of someone or something else due to something.