I've had numerous local herpers ask me why I only have one of each animal at the moment. Why don't I have a couple of balls? Why don't I have more cresties? Etc etc.
Truth is, I like having the variety. Each of my animals and their care is uniquely different. So depending on where my mood is depends on what part of the hobby I enjoy more at any given time. Sometimes I'm absolutely smitten over watching my snake. Sometimes I can't help but take out my little Leopard gecko for some climbing time on the couch. And sometimes I love just watching my hermit crabs fight over a piece of coconut.
Does it mean I care for any of them less at any given time? Nope. But it does give me variety each and every day. And that helps with the interest.
If balls aren't giving you the same joy they used to, that's okay. Ask anyone and at one point or another, something they love will temporarily (or forever) lose interest in something. Sometimes it comes back, and sometimes you just need a break.
If you still enjoy reptiles, but want to try something different, then go and see what it is you like. See if you want to get out of herps forever, or if you just need a break. Maybe you just need something unlike what you have now.
I'm fortunate to have a local reptile society. When I was considering a snake, dozens of people let me come and interact with their animals to see how I liked it. Got myself a corn snake, and I'm getting a Ball in a few days now. But I went back to just loving my geckos. Would I get more cresties? Probably not. But I would get a Leachie. Or a Cave Gecko. Something unique.
Stay honest with yourself and do what you gotta do.
I've almost given up my hermit crabs a few times now (more than my other animals). But, then I sit down and watch them and realize they are still pretty cool. As long as the animals aren't suffering, then you can do whatever you want to do. If you start dropping the ball, cut back a bit and see how you feel. You'll figure it out. We all change over time. Our interests too.