Looking back, a show last year comes to mind. Big "non-open" arena show, taper friend and his wife in town for it and good floor seats, but not really something either of us want to "make a real taping effort at".. yet we're tapers and cannot avoid feeling the pull.. so we sat next to each other and had a good time with recorders in our front shirt pockets.
We treated it as an informal "internal mic comp" between the M10 and DR2d. It was fun to record without any self-pressure to "do it right", it was fun to just have a good time and not care, and it was fun to compare the recordings afterwards, then basically forget about them. I even briefly considered starting a tongue-n-cheek comp thread here, including a matrix of the two sources.