I like to change them every day. It's nice to be able to wear a different pair each day few several weeks. :D I change depending on the weather, but generally keep my Plasma/Gold RAZRWires in the Jeep. It's nice to be able to talk and drive and shift and change songs and flip stupid drivers off all at the same time.

Since more than a few of us have discussed various "accoutrements" that we keep in our vehicles, yeah, I too have things to deal with people. 4 ft crowbar, 5 lb sledge hammer, KA-Bar, and taser. I like to be prepared if someone wants to swipe my Soviet Gascans...

If you saw my Jeep, you'd understand that all of the above items fit in perfectly. Don't judge me!