Hogwarts 3D Model

Hey again. So lately i have been working on a 3D model of Hogwarts School of Witchcraft and Wizardry from the Harry Potter series. I think the movies are pretty cool, but I am especially interested in the architecture of the castle. I decided to try to improve my modelling skills in Blender, and build the castle. So far it hasn't been too difficult, but very time consuming. I am about a third of the way through, and the hardest parts are still to come.

If anyone on here can give me any advice, I would really like to hear it. I don't want to finish the model and then find out no one likes it, so some criticism while modelling would be very useful.

Thanks!