I think the key to me not being burnt out as a photographer is to shoot for myself. As a portrait photographer, I'm always trying to keep in mind what a client might want. Most people who hire me already have an idea of what "my style" is and I try to stay true to that on a paid shoot. I'm always open to editing a photo a different way if requested, but for the most part, people know what they're getting from me. I am completely shooting for them which is what I'm there for and of course, I love doing it. I'm still trying to tweak it but in the end, I'm glad people like what I've done so far.
When I say I need to shoot for myself, I mean that I have to go back to what brought me to photography in the first place. In the beginning it was landscapes and now it's street photography. The greats may get paid for it but in reality, there is zero money in street photography. Photography started out as a hobby so there was zero money from the beginning. Money was never my motive. It just so happens that occasionally, I get paid to do something I love. I love taking the photos I capture from walking around and turn them into...something.
With street photography, there is no directing poses, taking time to adjust camera settings, or moving my light around. If you don't catch that moment right at the second, it's gone forever. With landscapes, you have time to think about your shot, adjust your settings, wait for the right light, etc... About 3 seconds after I took the picture above, the band started moving again. 4 steps after I took the picture below, the man turned right.
Could I have gotten a good picture after he turned? Maybe. Although I think his face would be more compelling than the back of his head. It's part of the game of street photography and it's why I enjoy it. You have to be on your toes, camera ready. I take those images, try to find something that draws me in, and create. This is why it's important to take time to shoot for yourself. Take pictures for your personal portfolio. Pictures that you create, that you love looking at will only make you want to create more. Take the time to experiment with your editing. Eventually you'll develop a "style" and figure out who you are as a photographer. Maybe it may not be what everyone likes. In the end, when you're shooting for yourself, the only person you really have to please is you!