[Silver Knight]

Gradients=Nonono.
Just because it's easy doesn't mean it's good.
Just because it was overused for a long period of time, doesn't mean its good.
Your walls will be much more interesting if you throw in some variations, actual detail, instead of just slapping on a gradient.

Unless your going for the smooth, dull look.

Edit: So I don't seem like I'm attacking you in your own thread, I might add that I found the flowers to be oddly intriguing, so simple yet I liked them a great deal.
And as for your non-gradiented parts of the tileset, lookin' pretty good.
Looking forward to seeing some new tiles.