That last one is pure beauty! OMG, so nice.
Regarding the stone walls - I still find that the larger bordering stone bricks look too plastic. I think it may be the cleaness of the edge colours but my art is strictly black and white stick figure level so I doubt I'm right. It may also look fine in 3d motion, but not the pic. Certainly the rest looks way better, and you could definitely call it good... just giving my opinion. (as someone who doesn't use and gfx enhancements at all!)
EDIT: Let me say as well that I think you're doing an amazing job man.