During the recent adventures with my wife's bike, I lost the last two pairs of Nitrile gloves I had in my commuter kit.
If you haven't tried using these, try 'em when you work on your bike next time. They help keep your hands clean. There are repairs which do not require you to touch the chain. But, when you have to mess with the chain, I find using these gloves a good alternative to using up the drinking water I carry to wash my hands or having to use a harsh soap to get rid of the grease. If you breakdown by the side of the road, these gloves are especially useful.
That's why I keep a pair or two in my commuter kit.