One thing that I forgot to mention: I do get the odd "cheap plastic heat-expansion" type snapping noises coming from the console area (where all the HVAC controls are), especially as my car warms up on cold days. Never had that with my '01 Integra until very late in its life (perhaps the few winter months before the accident).
Worrisome? A bit.
Am I going to do anything about it? I'm too lazy.