I have a themed village based on the colour white. I have one just because it's so much easier, it helps me to know what vision I want for my town and what direction to go in for my town. It also helps me with PWPS, so i'm never confused on what to do next with my town or what PWP to put down. The last few towns I had didn't have a theme and I was so unsure on what to do with the town, that I ended up deleting them. I don't have themed villagers, because I have certain villagers that I really love and I won't risk those villagers just to fit with a theme. If I did, i'd probably not even really like the town i'm building up, because I don't have villagers I love it. I have made some exceptions with PWPs though. The picnic blanket was just too cute so I used it.