I'm the wrong one to ask because every time I try something else, I end up returning to Fedora.

But what you switch to depends on why you want to switch:

• Want to learn more about how Linux works? Install Arch the Arch Way, or try out Void.
• Want a different DE? Well, you've got Fedora Spins if that's your main goal, but KDE Neon lets you try out the latest stable KDE stuff, which is fun!
• Looking for a rolling distro but don't want the extra complexity of Arch's minimalist philosophy? OpenSuse Tumbleweed is fantastic.
• Do you really want to dig deep and have total control of your system? Look into Gentoo or Linux From Scratch.

I've done most of these and more, and I'm happy to recommend something more specific, but I can't without knowing what you're looking for.

If you don't know what you're looking for, and just want to do something different, then do what I do when the distrohopping bug strikes: check out several distros' websites, pick a couple that appeal to you, then research those a little deeper, maybe rum them on a virtual machine for a bit. If you find one you like, back up your critical data and go for it!