What Jax said about depth being needed. Also, are you using each texture on it's own layer with a layer mask to determine what shows where? If so, you may want to try a bit more blur on some of the layer masks to get a better blend of textures. In a few places, on texture just "ends" in a way that is weird. This is especially true of those with rocks/bricks/stones/etc). It could be those places are fine like that IF they are places where walls meet the floor and you just need some highlights/lowlights to help differentiate.