In my main town, I just have 2 bridges and they're both the Wooden Bridges. They're in a straight line, so it'd be weird if they were different, although, I'm not really comfortable with mixing the different bridge types for my towns. In what used to be my main town (now my cycling town), I used all Fairytale Bridges, and in my newest town Icirrus, I just use the default Cobblestone Bridge. Although, in B&W, I think Icirrus has wooden bridges... so I might change it. Maybe. c: