In what way you can differentiate a good and bad poetry?

Question:

In what way you can differentiate a good and bad poetry?

Best Answer - Chosen by Asker: first of all-opinion.
then come the questions. does it have a good flow? is it descriptive? can you get a sense of what the subject is? is it beautiful? is it unique?
bad poetry is what happens most of the time. people think they can write, and they write a poem about love or heartbreak and it sounds the same (and as terrible) as any other person writing, using the same crappy phrases.
I think you have to use metaphor, and create your own new ones.
I pretty much hate all poetry, though. my opinion is-Its for the birds.