|Heroic Action Role-Play|
There is no end to your ambition. You wish to do things, own things, lead things. In the end, you may become a megalomaniac, but in most cases the overambitious never achieve their goals, and continue to struggle throughout their lives.
You should define some goal you strive for, something that the GM can use as an adventure hook. Most of the overambitious strive for money and rank, but some might strive for fame, excellence, divine grace or some other, lofty, goal.