I always have a camera with me. If I'm just going to the grocery store or walking my dogs, I'll have my Leica MP and 28mm lens over my shoulder. If I'm going anywhere else, I'll usually bring a bag with an extra lens, extra film, filters etc. If I'm going somewhere where I expect to bump into interesting things, I might bring my Mamiya 7ii outfit instead.
I bought a GRDiii this summer, to use when I was pretty sure I wasn't going to bump into anything interesting, but just in case wanted to bring a camera. The camera is fine, but I really don't know what to do with the pictures I take with it though. The quality is good for what it is, but not good enough that I'd add a picture taken with it to my portfolio. Now when I'm out with only the GRDiii, I'm almost hoping I won't find a great photo opportunity, cause it will bug that I brought the "little" camera. I barely ever carry it anymore cause of that reason. It's a good camera to have around the house though, being the only digital camera here. My wife uses it.