A couple of weeks ago, I was thinking that it might not be a bad idea to buy an extra set of nunchuks to keep in my geocaching backpack, so I started looking through the catalogs they keep on the desk in the dojo. I've had two sets for years already: one made of foam around a central core (so hitting your elbow, head etc with them while practicing doesn't hurt quite so badly) and one plain black wooden set, unadorned except for ridges engraved into the handles for better grip. Both of those live permanently in my taekwondo bag now, since a nunchuk form is one of the requirements for my black belt test.
I've been using chuks for about five years now, off and on. They are comfortable in my hands as a weapon, and one-on-one they beat just about everything other than a gun. I don't make a habit of spending time in dangerous places alone (I actively avoid it, in fact), but it's always good to be prepared. My keychain has a kubotan on it and my pack always contains both a pocketknife and a small canister of Mace; still, I can envision a scenario in which I want to keep somebody a good arm's length and then some away from me, and chuks would take care of that very nicely.
I was going to order another plain black set identical to my current wooden chuks, but the other girls convinced me to branch out a bit for the hell of it. The new ones arrived today and are now tucked away in an accessible pocket of my pack. Meet the new set, affectionately christened the "badass chuks" by my classmates since they look like something a biker would carry! May they never see action.