The more of me there is in the room, the less you will be able to see. What am I?

I am made of metal, but I love to catch fish. I have a sharp point, but I am not a weapon. What am I?

I have an eye, but I am completely blind. I have a very long, slender tail, but I have no animal body. What am I?

I have a golden head and a wooden tail, but I can't think of a single joke to save my life. What am I?

I have an expensive education, a degree in architecture, and I spend all day chewing my own fingernails down to the quick. What am I?

I am born in the deep mountains, live in a dark wooden box, and my only purpose in life is to set things on fire. What am I?

I scream at the top of my lungs whenever you slice my head off, but you keep doing it anyway just to make guacamole. What am I?