Ooh, I love themed towns, whether it's a very specific theme or a theme like forest, fairytale, etc.!
My second town is themed after the movie "Labyrinth." The left side of the town is happy and fairy-tale themed, and the right side is the labyrinth itself, which is made of bushes with lots of dead trees and topiaries. The bridge that connects the two halves is the Bog of Eternal Stench, and the paths are stepping stones (on the left) and the labyrinth tiles with moss and cracks (on the right). I designed a bunch of standees to look like some of the characters from the movie. Of course, the human residents and their homes are entirely Labyrinth-themed. The villagers are a mix of original neighbors and some that I adopted from Tumblr. The only villager who I sought out for the theme is Shep.
My main town, Ruddyoak, is partly Lord of the Rings themed--the town and my mayor, Athelwyn, were characters in a very old LoTR computer game by Interplay. My secondary characters are LoTR themed, as are their houses. Athelwyn is "me," so I decorated her house the way I wanted to, but made the basement into a tribute to Tolkien. The paths, town tune, and PWPs are not LoTR themed, but all go along with the reddish (ruddy) forest feel. I'm about to overhaul the town to be the same but better, so I don't have a DA yet. The villagers in Ruddyoak are just ones that I really wanted to have--no theme there.
My third town is almost ready to be revealed, and it is entirely themed after the first four seasons of a certain TV show. All of the villagers go along with the theme in some way. I'll post about it when it's ready.