FATE has some "wiggle room" where you can interpret and evolve the character more as play occurs.
This here is exactly what I find to be one of the real strengths of FATE, specifically in how it implements Aspects.
During normal, daily play, Aspects act as flexible narrative conceits which both add to a player's ability to spend fate points for bonuses, and which highlight weaknesses and character flaws. Interpretation of Aspects informs how narratively important parts of characters come to life.
In terms of evolution of a character, Aspects take on an interesting role. Changes to Aspects allow you to highlight changes in the narrative. Even small changes like from "proud father" to "protective father" can signal some real differences in how a character behaves and what is important to that character.
I've also seen some quite clever things done with story Aspects. One simple variant is that everyone takes an Aspect for their character that ties them to the current story, and the Aspect changes when a new story begins. This gives all characters a tie in with whatever story is going on at the moment. There are some variants of this, but that's the basic version.