I am excited by so many of the parts.
The mill set.
All of the animals are pure win in my opinion, printing on the pig is nice. Brick built animals have never had a place in my world especially when the horses and minifigs look so much more realistic. The grey horse is awesome but the blinders will limit his usefulness. The new windmill pieces are interesting. I want to get a hold of one. The bucket piece looks great. This set is full of useful pieces in great colors, tan dark tan, brown. So sweet. The civilians getting different color torsos is a big plus for me. They have earthy tones but not just tan and brown to add some variety in the civilian world. Two pitchforks and some food. The new shutter piece is very interesting. I hope they look good on homes and buildings. The green plates are useful as well. The brown ladder is a big plus for me. It has been seen so rarely in LEGO sets and I would like to get a bunch of them.
The dragon prison is nice. The parts in general appear very useful. I don't know what I will do with multiples of the dark pearl gates. The shields... Oh the shields... The barding is incredible and the new visor in dark pearl is a pleasant addition to the greathelms. My only wish would be a few extra dark pearl weapons to arm my battlepacks with... I like that this is a smaller set so I can get multiples of the barding!
The carriage is the best looking and designed that the LEGO company has ever released IMHO. The printed horses unfortunately will have a very specific use. These are the horses that will likely end up wearing all of my barding pieces. Still I am impressed at the two horses included with the carriage. The new king appearance is very welcome. The trees look great. I hope that is a dark pearl spear. (It is easy to see I like to arm my troops with the same color weapons as their armor. I'm kinda anal like that.

) What is up with the hammer on the tree? I half expect Harly Quinn to jump out from behind the trees! Although a nice set I will only buy a couple of these.
The blacksmith is a great little set. I like the printing on the legs for the blacksmith. The parts seem very useful in the construction. The new weapons are both hit and miss for me. I like the mace, scythe, and dagger. I don't like the new sword or axe. The new bow is awful but could make a nice piece for a balista/catapult for throwing a spear. The attachments on both ends of the bow allows for better connections. The chicken, bucket, unprinted pearl grey armor, and greathelm make this a multiple purchase for me as well.
Overall I really like the inclusion of a lot of the dragon knights. Now their numbers are close to the lions in the sets. The generic chainmail torso is included in three of the sets which makes me very happy. That torso is the most flexible and also the most rare in last years releases.