Honda Civic. This is my key to freedom. If I want to, I can at any time take to the open road and drive anywhere on the continent. Usually "anywhere" is home to Pennsylvania or a road trip with friends - but at anytime I could just drive to the coast and hang out on the beach ...
Bike Lock. This is me being environmentally conscious and physically fit. It's also another kind of freedom, cruising through the streets of South Bend, obeying stoplights only when there's someone around ;) It also makes me feel more rooted in this place, getting to know the city better, having more time to notice the houses and businesses and people on my way to and from work.
Choir soundboard. This is competency - getting all the mics set up before Mass, making sure everything is balanced. In reality I just barely know how to work the board - it usually doesn't need much adjusting - but being the one with the key makes me feel like I know what I am doing.
House(hold) key. This is belonging. This is not my house but it is my home, there to keep me warm and safe, and where we live life in common.
Work keys. These have a lot of different meanings for me. Responsibility, when I am unlocking doors to evacuate the family dorm during a fire drill. Authority, when a shelter guest needs my permission and my key to get into the kitchen or someplace. Ownership - this is my place, I know how things work here.
Soccer keys. These almost always give me a sense of gratitude, for being able to have soccer at our second home, the Center, and also a continuing sense of wonder that I am a soccer player. If I have the keys that must mean I am there almost every Sunday night - that's just crazy ;)
Anyone else have keys that have meanings for you?