Well, maybe love isn’t quite the right word. More like deal, as learning to deal with run levels.
When I moved over from Redhat to Debian I really missed chkconfig, a wonderful helper script that obviated the need to manually mess around with the symbolic links in the /etc/rc.* family tree. Ah, but sysvconfig to the rescue.
As an example, while I have Apache installed on my laptop I prefer to run this service selectively on an as needed basis. I mean, I don’t necessary want to make a web server available on my laptop when sipping coffee at my local wifi spot. While there are other options, like update-rc.d, sysvconfig is, IMHO, the easiest and most intuitive method to enable/disable local services.