"If you read two hundred or so novels, you do begin to notice certain general trends and themes. There was a point at which I said that if read another novel about a young girl beginning to menstruate, I'd scream."
--Salman Rushdie, "The Best of Young British Novelists", Step Across This Line
When you are rejected, it is nothing personal. Unless you've somehow managed to piss off the editor by standing outside his office and hovering while he read every single sentence of your manuscript and you kept saying "Are you done yet? Are you done yet? Areyoudoneyet?" the editor probably doesn't know you from Adam.
What the editor does know: "I just read thirty poems about deer. If I see one more fucking deer poem, I'm going to throw this whole stack of paper against the wall."
Salman Rushdie had the opportunity of sitting on a panel of people to select the up-and-coming list of new novelists. The quote above would be one reaction. I completely understand. When I edited the literary journal for my college...well, let's just say no animal poem fared well. And that was both my prejudice and my prerogative. My magazine, my call.
So, if you're going to write a poem, story, or whatever, just do it to the best of your ability, send it out, and cross you fingers. The person on the other side may be tired of it or not. You don't know until you send it away.
But if you're rejected, don't take it personal. It may have been one squirrel story too many...maybe the next editor will be less bothered. Keep sending it out.