So many things I could be
What am I not you will see,
To be loud, or to be a worry,
Pay attention, or be carefree.
All those things I could be,
I’m missing a letter, not three.
To be a large area that
You sometimes avoid,
To be very mysterious,
To guide you, or to annoy.
I could be all the things that I listed,
But like I said one letter is missing.
What am I?