What an interesting thread and how I can relate to the OP and many here.
I started in photography around 12 years old, shot for the high school year book all 4 years and shot my first paid jobs at 16. By the time I graduated high school I was making more money doing photo shoots then most adults at life long jobs. Fast forward a few years of doing photojournalism, wedding photography and about anything anyone would pay me for I was making a solid 6 figure income at 21 years old with a camera. I had all the latest gear, the first 3 Nikon F5 bodies in town with all new glass (I moved from Canon F1N bodies) and had everything from fisheye to 600mm at the time along with a host of lighting gear etc..
The funny thing is I really enjoyed wildlife photography but hardly ever did any. I was so busy chasing my next job or shooting I never did anything I liked to do. My hobbies at the time were shooting guns, bass fishing (I had a Ranger bass boat and fished as much as possible), I grew up hunting and when not fishing I was hunting but often thought how I would rather be shooting ducks with a camera and gave up hunting in my mid 20's. Its funny to this day I still have all the same hobbies and spend more money at different times on these hobbies then most. I tend to go big or go home when I get into something.
By the time I was 24 I was so burnt out on photography I hadn't taken a picture for personal enjoyment in over a year. If I wasn't getting paid to shoot I was out doing one of my hobbies. I had to make a judgment call and decided to stop doing professional photography and sold all of my gear. To say the least family and friends were shocked! I took all the money I had saved and the gear I sold and bought a business. After a few years owing that business a multi billion dollar company bought my business and franchised it. I work for them still today
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
.
Fast forward from age 24 to 44 and I had not owned anything more than a point and shoot (Nikon of course lol) and an iPhone to take pictures.
Years of working, getting married, moving across country a few times for work I still shot guns a lot and went bass fishing as much as I could but haven't had a boat for the last 10 years or so.
Getting married as most can imagine changed my free time and my work/life balance. Over the years I looked for something that we could do together, my spouse likes shooting guns but not at the level I do. Same as with fishing its enjoyable but not at the level I like it. One thing we have in common is we both want to travel to experience different things. I have traveled to 46 of the 50 states and a few places out of the USA but work travel vs vacation is very different.
I was like hmmmm if I am going to spend all this money traveling (we are considering buying an RV so we can take the dogs and I work from home so weeks away is possible) I was like I should get a camera again. Well folks that has been a deep rabbit hole to say the least lol. I tend to over research buying new stuff to the point I just dive in. Well I did that in Nov 2019 and dropped money on a full Nikon kit. Now I am dipping my toes into the Sony pool so you can only imagine the research and dollars spent. I have a 600f4 to buy next month and other than maybe swapping a few Nikon for Sony kit I am done with GAS and we are planning trips. COVID kind of put the breaks on travel but the good thing is I have spent the last year and half relearning most of what I already knew and learning digital, post processing etc..
To address more of what the OP asked I promised myself I would only do photography for what I want to do. It is funny I have had multiple offers to get paid to do different things and have passed on all of them. The last thing I want to do is go down that path again.
I have recently done astro, landscape, cityscape, wildlife, flowers/macro, pics of my family and dogs and am open to shooting anything I find interesting. My emphasis is on wildlife but I don't want to limit myself to just that as I like you I run the risk of getting bored with it. A suggestion would be have you tried a different type of photography? Maybe something you haven't done? Something that creates a new challenge? For me I enjoy researching and buying gear (not paying for), learning how to use it, and working on capturing an image I don't have and even when I do, challenging myself to do even better when given the opportunity.
I have found that I love photographing hummingbirds, I did a little research and found there are 300 species of hummingbirds and around 20 or so species reside in the USA. Costa Rica has 52 species. This has given me a path to work on capturing what I can in the USA and it has been a dream to go to Costa Rica with Steve. For me this gives me excitement and something to work towards. First step is to acquire the gear I need to maximize my trips (one lens to go and I am done with that), second is researching and traveling to locations to capture them (been doing this already) and using that experience to reach a skill level that leads me to the final step of spending the money to go to Costa Rica and other more remote locations to capture more species and or improve my shots.
Having this as a passion project for example gives me some focus, something to look forward to and the rest of the time other subjects fill the time.
I think this will keep me motivated to get out and get up early! Saturday I was up at 7am to shoot flowers, Sunday up at 1am to drive 2.5 hours each way to shoot the milky way. Last week I spent an extra 1.5 days in FL after a work trip to shoot wildlife and got a bonus of seeing and shooting the space x rocket, and the week before that visiting family in CA and shot a bunch of hummingbirds
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
all while learning the new Sony a1. Now we have bad weather for a week and I have about 900 images I have selected to edit.
Sure hope you don't quit, if you do find something else to grab your interest. Nothing worse than just becoming a couch potato.