Well, I'll tell you that I prefer systemd because I can comprehend its declarative unit files and dependency-based system a lot better than the shell script DSLs and runlevels that I've had to mess with in other init systems. systemctl status has a quite nice output that can be really handy when debugging units. I like being able to pull up logs for just about any service on my system with a simple journalctl command instead of researching where the log file is.