No hard feelings, though I'm not sure why I should be offended in the first place.
I do hope you realize, however, that the best way to draw better tilesets is to learn how to draw better tilesets. Unless you need help with something extremely specific (such as drawing trees, anyone remember that?
) you're better off working on improving in general than you are asking for suggestions or criticism of any sort. That's not to say that the latter doesn't help - it just doesn't help as much as many might think.
I could provide plenty of micro-improvements ("constructive criticism"), but really, it would be pointless. In fact, I'm going to do it just to demonstrate how pointless it is/please someone for entirely the wrong reason/accidentally offend someone for about the sixth time/all three.
-Pretty much every color used has way too much contrast with nearby colors. The white spirals look unappealingly bright against the blue ground, as do the bright cyan outlines next to the borders. This also applies very heavily to the pillars.
-I'm not sure how the little "windows" would be used in the first place, but I recommend making their width:height ratio less extreme. Adding a bit of alpha channel might help as well.
-The statue has highlights, but nothing else does; inconsistent lighting is bad. And you flipped the tile without even bothering to change them, so it looks very strange if you use both tiles at the same time.
-I can't tell what the dark thing at the bottom is. Is it supposed to be a bridge? It appears to be a background object, and one that will always have to be 3 tiles long to not look strange, and, well, I still don't know what it is. The dark outline on it confuses me further.
-I can't imagine anyone actually being able to use the fancy texture tiles, as they are completely inconsistent with the style of the rest of the tileset.
No hard feelings...right?