I love all literature, but I think poetry is the form I love the less. Maybe because it's easier to write poetry and make it sound good, than it is writing fiction for instance. Therefor there is a large number of thieves who call themselves "poets".
Anyway, there are a few pieces of poetry I do love. I'll begin with a true classic (Which I can recite outloud from memory... well the first part at least).
By Edgar Allan Poe
Once upon a midnight dreary, while I pondered, weak and weary,
Over many a quaint and curious volume of forgotten lore,
While I nodded, nearly napping, suddenly there came a tapping,
As of someone gently rapping, rapping at my chamber door.
" 'Tis some visitor," I muttered, "tapping at my chamber door;
Only this, and nothing more."
Ah, distinctly I remember, it was in the bleak December,
And each separate dying ember wrought its ghost upon the floor.
Eagerly I wished the morrow; vainly I had sought to borrow
From my books surcease of sorrow, sorrow for the lost Lenore,.
For the rare and radiant maiden whom the angels name Lenore,
Nameless here forevermore.
[Read it all, here: http://www.houseofusher.net/raven.html