One thing I really appreciate about Debian is that when a new stable release comes around, I can just upgrade and be reasonably sure nothing bad will happen. It's not exciting, but a fair amount of the time, this is what people expect from their operating system. Support my hardware, give me the software I need, and stay out of my way otherwise. And that is what Debian does very well.
That's good feedback and I've heard it from other people. Personally I've never been able to dist-upgrade Rapbian or Ubuntu without breaking the OS.