Hello again all,
So its been a while since I tried to create a tile set. Anyway I was trying to make a soil/dirt title for my game and after serval hours of touch up work this is what I came up with.

I think it looks good but at the same time there's something off about it and I just can't tell. I tried to make sure to not have any single pixels to ovoid noise but it still looks wrong. Oh, and I wanted it to look more realistic and less "simple".
So please let me know what's wrong with it and how to fix it.
Here are other attempts to. Let me know what you think of these:

The two on the left have a concert slab on the top and the one on the far right is a rock tile I made a while ago.
Thanks for any and all feed back!