I have all suspension bridges (the original bridge was in a horrible spot, had to replace it).
Whenever my villagers suggest Brick or the Zen(?) bridge, I'll use those
I have one fairy-tale bridge and one cobblestone bridge at the moment. I plan on replacing the cobblestone bridge with a zen bridge when it is requested. I'm also gonna have another fairy-tale bridge but I'm waiting to get the picnic requested first because it will be quite close to the bridge and I don't want nothing to go wrong there.
I have two cobblestone bridges. I want the brick one, though, but, unfortunately, no one has suggested it. Chow suggested a modern bridge but I think it's ugly.
I have two cobblestone and one wooden suspension bridge.
I'd like to eventually get the Zen bridge and Brick bridge, but I'm waiting on requests from villagers.