Here is the poem that impacted me in the fifth grade (author unknown):
Little Miss Muffet, sat on a tuffet;
eating her yogurt plain.
While vampire gangs, with flaming fangs;
were eyeing her jugular vein.
While I have produced little (ok, zero) writing that is likely ever to be remembered, I'd like to think that my contribution to poetry with this little ditty might inspire someone, somewhere (I think I wrote this when I was about 25):
I like socks.
I think they're neat, I like to wear them on my feet.
Roll 'em up or roll e'm down,
Wear them in the city, wear them in town.
I like socks.