It has been my daily driver on laptops and desktops for eight years. I have run home servers with it as well.
It's my primary desktop as well. I like it because it's low churn, everything I need just works, and most of the configurations have sane defaults so config files tend to be short and simple or not needed at all.
I don't hack on the internals or build my own ports, I just use it. It stays out of my way and I like that.
This may seem like a ridiculous comment but I love that a lot of work on Linux has been to make it easy-as-pie to install/setup quickly and I feel like it's happened in the last couple years (cgroup + systemd stuff mostly). I praise docker for making immutable services commonplace, but I also love projects like cockpit from redhat + netbox + coreOS. There used to be so much technical debt that went into getting a server off the ground and monitoring it.
I'm weird, dunno if others agree ~
Also, installation was quite fast if you knew what you were doing.