What's that one feature you liked so much while distrohopping that you want it by default in all distros?
I have always been discovering new things about Linux distros while distro hopping. And when I get something I really like, I just copy the package name and make sure I install it in every distro I use in the future.
BTRFS snapshots like openSUSE and now also Fedora has it. I don't want to use a distro without them anymore. Unfortunately, configuring them yourself is a bit more involved than just installing a package...
Oh, on openSUSE, you don't need to configure anything. Just install with the default partition setup and it will automatically take snapshots of your operating system (/home/ is excluded) whenever there are changes.
It uses incremental snapshots, so they won't take up infinite space...