I was born on the cusp, so I share a little bit of capricorn as well.

Sagittarius:
On the downside: Arrogant, Lack of Humility, Bigoted, Careless, Lawless.
Your good qualities include: Optimistic, Jovial, Generous, Philosophical, Lucky.
The betterment of humanity through integration of your beliefs and aspirations will be your lifes work.

Capricorn:
On the downside: Cold, Miserly, Indifferent, Rigid.
Your good qualities include: Practical, Self-disciplined, Responsible, Reliable.
Controlling your abilities, ambitions, destiny, and priorities will be your lifes work.

I did research on both of the signs and found that I'm a little of each, because I was hours away from being Capricorn.