When a player creates a character, they're leaving behind most of their own personality, and ways of thinking to take on a new slate; especially if they are born into a family.
As a character grows throughout life, and they have new experiences, those experiences can affect and change who they are; just like in the real world. For instance, if a five year old character jumps into a lake, and gets bit by a snake, they probably won't like snakes anymore. Or maybe they feel like they must detroy all snakes?
It's up to you to decide which direction the effects of experiences like this will take, but there will almost always be some kind of effect. This is what makes character unique and different from each other. It's what gives them their quirks, and habits.
Did they grow up in a culture where all females are dominant? Then they will probably have a certain view on females that might be different from others outside that culture. Did they live in a very hostile enviroment, or a humble one? Did their culture have gods? Were they herbivorous?
All of these things can shape and change your character. There are also exceptions, of course. Not every character ends up following the traditions of those they grew up around. Perhaps an outsider came to visit with different views, and this affected the character, making them want to try something different?
All these things are possibilities. The most important thing to remember is that these kinds of changes only make sense if there was something to initiate it. ,Be sure to keep all of this in mind, especially if you're new! It will help you achieve a much more satisfying game experience.