very atmospheric, if a little dark. put some rocks and stones on the ground. that would make it a bit more interesting. You might make some kind of .. what's the word. off-shoots from the rock walls or something. just so they're not quite so up/down. it'll give them some depth.
I never did make a "my house" map, and I was bored a couple days ago, so I figured I might have a go at it. I think it's turning out pretty well, except that most areas are over-scaled. Even so, it's a fun side-note untill I get Q4 installed (which arrived today). I've spent about 2 days on it so far. There are other areas in the house, but I'm not showing them because they are quite empty.