Every year since 2008 when I got my first DSLR, I brought my camera and tripod to every 4th of July and in some cases two firework displays in two different towns. Now it was okay at first to learn how to shoot fireworks and I got some incredible pictures. After a while it just became redundant because my town has literally the same firework display every year. Last year they change the location of them which made it even more difficult to get a good shot.
I don't live in city with big buildings that add interest, so I don't have much options to make them more interesting. I did however, tried capturing the crowd and that one came out okay, probably one of my favorite firework shots.
Last year, I was literally the only guy standing in the field with a tripod and camera. I'm not doing that this year. Instead I'm just going to watch and enjoy the display of awesome pyrotechnics with my family and beat the traffic!
I'm not saying YOU should stop shooting fireworks, but if it is getting redundant, why not take a year off and not watch them through the LCD screen? Enjoy it!
Everyone loves the grand finale! I recorded it one time and it came out great, you could try that instead of taking pictures. Just let your camera record the event and enjoy it.
Someday I would like to venture out of my small town and photograph other firework displays in other towns, long as they don't fall on the same day as my home town..which I am in luck because my town does the 4th of July festivities about a week before the others...its usually a really big event with ton of people visiting from all over, after all it is the first one in Vermont!
So my recommendation is, if shooting fireworks is feeling redundant, then try to add some interest like say, include a portrait with fireworks in the background or if you live in the city, try to find different locations that might add some interest. If all else fails, leave your camera at home and enjoy the display and make memories.
You can't photograph everything, sometimes you have to enjoy life.