Sure, battles are fun. But after a while with the same circumstances for every battle they can get dull... fast. I enjoy adding interesting elements to battles. Here are a list of a few I've used:
1. Fire
2. Water
3. New landscapes
4. Precarious heights
5. Dangerous weather
6. Meat grinders... as well as other creative death traps.
If you have any other ideas on how to make battles more interesting, then reply.