RHEL because it is rock solid and stable for work. I very seldom have stability issues - and if I do it is most commonly my own fault. The QA efforts Red Hat puts into RHEL is quite good.
Fedora as that's the roots of RHEL, but more bleeding edge. When doing development, I do it on RHEL and test it on latest Fedora. That gives a solid baseline for testing changes.
Linux Mint, I really like the Cinnamon desktop which is their creation, and find it just works, no tweaking, no glitching, just install, use, forget that this isn't a Windows machine or a Mac since like them, it just works, its just an appliance.
For reasons of no real reason at all, I run the Debian variant
fedora secureblue specifically.
it's the most secure linux distro you can get without using qubesos.