Thats a fantastic castle you built there. Its got some great details (the I especially liked the armories). I also respect how well you used the large "junorized" pieces.
I think my favorite part was the small door you added in the main gates. Its a pretty comon feature in real castles, but I think this is the first time I've seen that detail in a moc.
It would be great to see additional modules built for this. For example: you could build a mill, blacksmith, or maybe even a large keep. Then you could play around with the sections to make anything from a small border-fort to a full blown citadel.
btw, I visted your site and I really enjoyed your other mocs as well. That zombietron cruiser is awesome