What are some characteristics of confessional poetry?

Confessional poetry characteristically deals with private, intimate feelings and experiences, and typically these feelings and experiences draw upon themes like death, relationships, psychology, feelings of depression, sexuality, and moments of personal trauma.
Confessional poetry is usually autobiographical and thus written in the first person perspective. It also uses metaphors and allusions to translate deeply personal experiences into a more commonly understood language. In Sylvia Plath's "Daddy," for example, Plath alludes to the holocaust to communicate her feelings about her relationship with her father, and she uses metaphors to describe how, after her father's death, Plaith felt as if she had been "stuck (back) together with glue."
Another common characteristic of confessional poetry is lyricism. Sylvia Plaith's "Daddy" again provides a good example. Throughout much of the poem, there are full and half-rhymes for the word "you." In stanza five, for example, the words at the end of the lines read: "two . . . you . . . root . . . you." In this instance, the repetitive rhyme implies an insistent, increasingly accusatory tone, echoing the speaker's feelings for her father.