Rime Revisited

I was excited to read Coleridge this week as I love "Rime of the Ancient Mariner". I remembering reading it in Honors English in high school wondering what sort of trip Coleridge must have been on and where I could get some of the same. I think my favorite stanzas are the ninth in part the second ("Water, water, every where…") and the eleventh in part the third ("Her lips were red, her looks were free…") just for sheer blood-curdling pleasure. I love how creepy and strange the whole becalmed ship section is, it all just seems like some gothic Poe-esque opium fever dream. A question that I have always had is why does the Mariner choose that one particular wedding guest to accost? Was there something in his look or attitude that moved the Mariner? Did he feel that the Wedding Guest in particular had something to learn from his story? I have searched the stanzas for an answer but haven't ever been able to come up with anything satisfactory. That doesn't necessarily mean that there isn't an answer somewhere in the poem, goodness knows there are still some stanzas that I am trying to understand even now. 

Reading "The Eolian Harp" I'm trying to figure out what the point of the poem is. At first it seems as though Coleridge is enjoying himself romancing and and pondering while on his honeymoon but then it seems that at a reproving glance from his bride that he feels penitent for his idle musings and resolves to approach thoughts about the divine with more respect. Why would he feel guilty about idle thoughts? The comparison between an Eolian Harp and his mind seems to remove the potential for guilt since an Eolian Harp is a passive instrument and reliant on the currents of the wind for stimulation or impetus to action. If "all of animated nature/Be but organic harps" that are only stimulated into thought as "o'er them sweeps/[…]one intellectual breeze" then whose fault is it if those harps devolve into "many idle flitting phantasies"? Or is it as a gesture of gratitude for his "peace", "cot", and his "heart-honour'd Maid" that Coleridge is responsible for attempting to regulate the thoughts that flit through the imperfect mind that God gave him?