First off... Welcome Aboard!
Since you posted maps in your introductory post I dub thee newly repped *bonk*
Be sure to start thread in the WIP forums as you go.
Its clear that you have some skills with Photoshop, be sure to check out some of the tutorials here there are a bunch of good ones.
You have quite the bevy of styles here. Love the trees in your town map, they are really well done. I think all it needs is some kind of pattern overlay on the buildings and grass and it'll really shine.