I agree with Term1ated. Cozyness over size definetly. But I can't stop liking the idea of a castle with loads of hidden tunnels and a secret shrine to Sithis. Some evil cult following would be cool. Really proper gothic style castle, which no (not even Skingrad) in-game castle captures for me.
Some nice cottage would be nice though. I think a mod should have something specialthough, not just a cottage, but a cottage with the walls made of tree-roots or something.
PS: Sorry Term1nated, I seem to be agreeing and replying to your comments all over the place. Weird.