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I love that you gave many different styles a try, also that you did building in survival makes you experience minecraft totally differently and at last makes you just again a bit more versatile and more skilled; also that you seem to be interested in redstone (hopper) mechanisms makes you sympathic to me as that also is one of my big interests, but on MCME unfortunately we can almost never use these things...
Now regarding building skills I do like very much the small stone/wood houses you showed off. The look very "organic" and realistic, already a lot better than the cubeoid boxes unexperienced builders construct, and the level of detail is very good there, at least on the outside, please show me the interior of these!
The big building out of the white bricks and with the sea lanterns lacks detail though; it reminds me of old moria which has a similar style just with different blocks, there you could do more, maybe a fancy floor pattern or some more advanced "3D-ish" walls (check out any newer city on MCME on how to make nice and interesting walls), depending on the purpose of the building some furniture may match the scene and make it look a bit more lively.

Last point on the dome roofs in your Tirion build: While such roofs are surely a good and interesting idea I somehow just feel like it looks a tad too blocky in comparison to the rest, I know theres no way to make a less blocky green dome, but here I'd rather go with a different color and something closer to a round dome instead, using stairs and slabs.

Just to clarify: This week's theme is NOT Mordor, that was a joke, its Moria East Gate as stated in the TB post.