Answer:
I am a nut with a hole
Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
I'm an animal. I love marching. I always wear a tuxedo. What am I?
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
I am whole but incomplete. I have no eyes, yet I see. My largest part is one fourth of what I once was. What am I?
It is something you make after you've weighed your options.