Lately I've been running Fedora. Early Ubtuntu & Mark Shuttleworth were a big part of my teens and my first real experience with a Linux Desktop and Philosophy tied to Open Source Software. It's been fun watching Ubuntu evolve over the years and see distros like Mint evolve off of them as well.
Fedora isn't perfect, but it can go for weeks without updates and then update cleanly reliably, which is not something you typically get with rolling distributions. This makes it well suited for use as a dual booted secondary OS or VM OS.
Would I use it for a mission critical workstation or server? Probably not. But for daily personal use, it's been completely fine for me and I would highly recommend it to others.
Slightly tangential question: Is there a distro that has a stable "core" (kernel, maybe some userspace libraries) but uses rolling releases for everything else? Ideally, that would probably give you the best of both worlds for a personal machine.