English poetry has many forms. The poetry that has foundation in lyrics, rhyming words and rhythm is Sonnet, Ode and Elegy. In these poetries, all of the parameters viz, rich lyrics, rhyming words and rhythm may not be present together. One of them might be absent, but rhythm is important and has to be omnipresent while the flow has to be maintained throughout.
So, we understand that the rhythm and flow are the two important parameters of poetry. Such poetry requires a lot of imagination and richness of language. Poetry is nothing but the art of using language, articulation and formation of meaningful verses.
Majority of the poetry is the mastery of articulation, for example Ballad and Epic are examples of Narrative poetry, a form of storytelling. The Ballad and Epic might be less complicated to the form of poetry that depends on strong lyrics and richness of phrases. The Ballad need not be rhyming but the audience needs to be held together with the dramma and action. This is the soul and essence of Ballad and Epic poetries.
Some might argue that parody is also a form of poetry that is a manipulated version and humorous imitation of a serious piece of literature or writing. For example a popular parody could be the hilarious and burlesque imitation of a musical composition of Hamlet's soliloquy.