#1 - looks like you learned the trick of shooting sunsets for color

my guess is that this was shot on auto meter as the photo you posted is indicative of that. you captured some great colors and saturation, as well as the silhouette. my only niggle is a minor crop.
this 'locks it down' a bit and forces focus on the center of the frame, otherwise; my eyes drift to the upper left.
nice shot.
#3 - ah yes, the environmental vs the portrait shot. well, as QP pointed out, it stands as a cluttered environmental photo. this means that we, as viewers, are to take in everything that we see to understand the environment and what is happening. it is very difficult to distinguish between a snapshot and an environmental photo as there is often a lot of background and foreground noise. a simple lil crop would give this a portrait feel with enough information to understand where it was shot. :
#2 - my only comments on this are purely subjective. some folks like this type of shot, i don't; take what i say in that context.
the composition is well done; a flower in the center and a flower in the 1/3 urc. your dof looks ok. with this type of photo, you are asking the viewer to buy into the affect and reality. for me, it doesn't work. the flowers appear to be nicely saturated, but over exposed. the blur appears to try to extend the flower, not accentuate it. in all it is a very creative and well seen shot.
keep shooting and posting.