We didn't end up going to our local fireworks this year (I had a very early tee time the next morning ), but they have not turned out very interesting when I have shot them in the past -- there is no interesting backdrop at the township park where they are held. Here is an example from the last time I brought my camera in 2012:
I did shoot a fireworks display at Niagara Falls a few years ago. Unfortunately, our angle did not allow me to get the Falls in the shot with the fireworks. The best I could get was some of the lights from the NY side (I was shooting from the Canadian side). Here's one:
The light display on the Falls themselves was more interesting, IMO