What are features of Romantic poetry of the 19th century that are evident in the works of William Wordsworth, William Blake, John Keats?
This will be fairly broad in its reach. Books could be written on the topic, and books have been. Certainly, what you find here might be good sample of further research and should prompt you to engage in it. In all three writers, I think that there is an emphasis on the subjective experience. The subjective individual experience is one that can yield universal understanding. The element here that brings both these realms together is the idea that through the individual and through understanding individual sensation, one can understand all of humanity. Through something particular, something objective is revealed. All three thinkers place an extreme value of this experience. At the same time, there is a conscious effort on the part of all three writers to reconfigure the notion of art along subjective lines in ensuring that artistic structures are ones that embrace this individual experience and articulate it.