What does it mean if someone is ego-driven?
To be ego-driven is that the person in question gets very well motivated by themselves.
They may also think that their actions are the best ones, and sometimes they may not consider other's actions.
But in general... ego-driven is that the person has good confidence in themselves, and that they do not need support from others to reach their goals.
It can sometimes be a bad thing, since they may get too self centered.