I'm afraid my voice is dull and my stories are boring. I'm afraid I have diarrhea of the keyboard. I'm afraid I'm really a crappy writer, despite what others have said. I'm afraid because I write horror, people will just assume I'm a crappy writer.
Most of all, though, I'm afraid of the 'but'. Great story, but... Great premise, but... My mother used to give me the 'but'. That looks nice, but...
She did it so much that I supplied the but myself when someone gave me a compliment. I used to say it out loud, but my husband broke me of the habit. What he doesn't know is that I still say the words inside my head. Or maybe it's just my mother's voice I hear.
I'm not afraid of rejection, as long as it has no 'but'. I would prefer a sterile 'no thank you'. It will leave a cleaner wound.