I have always BF more on one side than the other, but now it is about 95%/5%. It staried because my son (now 9 1/2 mos) always preferred one side, I did not make a concerted effort to be even, and by the time I checked, there was definitely more milk coming out of the MAIN side. Over time, it has become habit to always start with the main side. We co-sleep and he is always on the same side, so it is much easier to nurse at night on the one side. What I wonder is: "should I not even bother with the LOW side or make a concerted effort to really work on it and try to even out the 2 sides?" I am a bit conscious of the difference in breast size, but honestly, I doubt most people notice, partly since I am pretty small chested. Does anyone else have the same situation going on?