Poetry has many, many types of meter, and no two of them read alike. Each meter is specific, and has rules.
Sadly, when most think about poetry they think only about the sing-song iambic pentameter. Much good poetry has been written using this meter, such as Henry Wadsworth Longfellow's poem "Paul Revere's Ride. In this poem, the meter, if read properly, sounds like a galloping horse.
http://www.legallanguage.com/resources/poems/midnightride/
If you don't know the various meters and forms and structures, or what a metric foot is and how to use it, you aren't writing metered poetry, you're just writing prose, or, at best, free verse, which is seldom poetry, either.