The metal and stonework on the textures is superb, I must say, in terms of its raw texture. Truly admirable that you made that raw in Photoshop, it's a feat not many could readily accomplish.
Texture 1: The top right stone's bottom edge is lit incorrectly, and the mortar between the stones might be brighter, depending on whether it is a wall or a floor.
Texture 2: The top lip of the concrete trimming the circular grate is again lit incorrectly - it should be dark, and above the dark selection is where the light catches, not on it.
The top of the texture cuts off.
In my opinion, the bottom trim on this texture is just magnificent - coloring, lighting, all of it. The texturing style you seem to have, very World of Warcraft-esque with a realistic twist, really comes together there. That tends to make me believe that the rest of the texture could look just as good if it all had the same darkness and dramatic shadowing.
Texture 3: Metalwork is magnificent, but if I can name the filters you used on the red background, that's generally not a good thing.