William blake is my favorite romantic poet without doubt, his poetry really gives me physical ache which I find strange! 
 From Songs of Innocence my fave poem is THE CHIMNEY-SWEEPER every time I read it I ended either with tears in my eyes or a smile on my lips, maybe both, not sure. I just love it. 
 From Songs of Experience my favorite is the tyger, how silly I was when I thought it just a mere pleasant 'song' for ears. When in fact it was not a song at all, not even close to a one. I won't go deep into details about it cuz it is one of the most analysed poems in the internet but let me tell you this whenever I see a tiger I'll murmur tyger tyger burning bright and smile, whenever I witness the triumph of humans over nature and/or the corruption of human beings I will also murmur the same thing but definitely not with a smile.