What's your favorite poem?

I have this really odd affection for the Kubla Khan. It might well be my favorite piece of art, for what it represents and the story behind it.

I also managed to write a poem I think is acceptable. Once. Only once. I might dig it up later.

Well, I actually have two favorites, but for different reasons. 
 

1) What is this life if, full of care,

We have no time to stand and stare.
No time to stand beneath the boughs
And stare as long as sheep or cows.
No time to see, when woods we pass,
Where squirrels hide their nuts in grass.
No time to see, in broad daylight,
Streams full of stars, like skies at night.
No time to turn at Beauty's glance,
And watch her feet, how they can dance.
No time to wait till her mouth can
Enrich that smile her eyes began.
A poor life this if, full of care,
We have no time to stand and stare.

That's my "favorite" because it was a big part of my childhood. One of my earliest memories is my father reading that to me, and it just felt... beautiful, to someone like me who lived in a city so deprived of nature. 

2)  Sunset and evening star,

"Stopping by Woods on a Snowy Evening" and "The Road not Taken" (duh) by Frost. "Invictus" by Henley.

There are more but I don't remember their names. These three are my favorites.

Rime of the Ancient Mariner by Samuel Taylor Coleridge 

and

Charge of the Light Brigade by Lord Alfred Tennyson