This is something I've never considered before and wanted the opinions of the experts. We use VLANs day in and day out for various network tasks. My modus operandi is that in general, if something supports VLANs, that port is getting trunked because it just makes a ton of sense if there's even the slightest chance you need to do more than one thing on that single link.

As I ponder this, though, I'm wondering whether there's a performance penalty involved with this line of thinking? Is the impact negligible?