I find aside from the odd night shots, about 75% of my shooting is with the 12-40mm. The 75-300mm is getting some time in, but the amount I can crop with the pro zoom and still get usable images is truly astounding. I really didn't think I'd like it as much as I have. The 60mm macro lens is also a marvel but obviously a little too specialized for general use--I've pulled it out a few times. I brought along the 45mm and the 17mm along with the Rokinon 7.5mm and collectively they haven't been used much at all. But because they add such little weight I don't see any reason NOT to bring 'em. Sorry for gushing, folks. Just wanted to pat Oly on the back a little.