What it is e.g. dramatic monolouge, Haiku, ballad, sonnet, free veerse etc
the way it is set out. line and stanza length, stanza breaks etc
is never the poet ( well not always) it is what the poet is trying to portray.
can include the 5 senses, it is what the poet is describing and what you picture.
the devices used, what it is relating to anything specific with the language.
the mood that is created by the speaker- Voice + tone = mood
the way the speaker is talking.