I don't care for those tiles. I can see that you (or someone) worked really hard on them, and that's great. I'm not saying your tiles suck, I just like the original set a lot better.
Here's what I think is wrong:
Grass : I dont like the color green, a little too bright for my tastes
Cliffs : Original Idea, Just the yellow/orange clashes with that color of green grass
Trees : Look great, just dont seem to fit in
Overall : New/Old things dont seem to fit in the same game (Like grave Next to the large puddle stone (Not saying you'd do that)
Here's what I like:
Outsides Of Houses: These recoloring jobs look pretty good
Floor Patterns : Most of them look awsome
Steps And Pillars : These used to be gold, but now are cyan. I like them.
You asked for our opinion, here is mine