After all of that appeared, the castle started decorating itself for the holidays, but... something else came with it: a very strong feeling of comfort, of belonging; almost like the polar opposite of homesickness. Given that I haven't really considered anyplace in particular home for centuries, save the TARDIS - which I already had - it wasn't difficult for me to realize that the castle was trying to pull some wool over our eyes. It was almost as if it wanted us to consider it our home, rather than all the places we were originally from...