The textures are pretty neat, but:
Texture #1: This is a steel panel. Your texture looks like rock.
Texture #2: This is dry soil with cracks. Apart from the (deliberately changed) color, your texture looks very artificial in comparison, with less small irregularities giving the texture a naturalistic appearance.
Texture #3: This is a rock texture. Yours looks like black sand, it is too soft.
Texture #4: Again, this is a crystalline rock texture, like granit. Your texture looks rather organic and doesn't match the original's appearance.
Texture #5: As it is a new creation, it looks really interesting. I wonder how it would look inside a level, and where to put it, as I am not sure
what it is.
Btw, do your textures tile properly (ie. w/o showing seams)?