Like I said, I don't point fingers until I have full proof. I am glad you did not take this the wrong way. It is nice that you explained how you work. See, I start on one set, work my way through it until I get bored, and start a new one. I would never know how to sprite free will (I have to have some structure. LOL). So, I apologize and am sorry.
On Topic
Anyway, I have not and will not say your sprites look bad. I just said that the rehashes of the 2-branch tree looked bad. The original is awesome. It has a good shape, an excellent feeling of texture, and good shading. My only complaint is the practility of the size, but then again, I am not using it in a hack anytime soon. Now, the large rock is really well done. As with the tree, it displays an excellent felling of texture. The shading is good, though top should be a little lighter. The shape is excellent, though is has a little bit of a "synthesized" feel, if you know what I mean (like it was carved into that shape). Now, there are some problems with the hut. The shading needs completely reworked, the palettes along with it. The darker lines need better anti-aliasing, as not to appear too jaggy. Try making the colors in the palette a little closer together so they can blend better.For the dome part, the shape is also going to need to be redone as well. Try making the base more of a partial circle than an arc. For the shading of the dome, just anti-alias it like before, though try it with a closer palette (and try to make the lines appear less jagged). For the flower, it really looks like a jungle flower, it being that big. Now, that isn't a bad thing. It also has excellent shading, though the shape could be slightly improved. The log fences are great as they are, no complaints. Now, the other trees are also good, but they have a severe lack of detail compared to the rest of the tiles of the map. Try making it appear it has leaves, for a more textured effect.
Few... Done. Sorry I go into detail with my critique (perhaps I go a bit overboard). Also, I am sorry for my previous post, and please accept it.