I would have to say I like the uranium ore, though I do agree it could use a little more color. I love the work you have done so far. If I could offer a critique though, although I love your wall textures compared to the vanilla ones, yours are much more square than the originals. I do like the fact that the original wall textures had a lot more wiggle to them, made them seem a little more organic. Anywho hope you continue working on them, and best of luck.
Cheers!