When I wear ear buds, for whatever reason, they tend to move away from a snug fit, and I have to readjust them a bit, and when moving about, it's happens more often. You actually got it right the last time, everyone has different ear shapes, and some types of phones work better than others. In fact, while I love the PK3 value and sound, I wore mine for 2 hours last night, and they made my ears sore. Never had them on for long before, and now may have to sell them ... again (3rd time). Seems nuts, but I had never tried long-term wear before. I am going to see if they feel any better without pads, and if not, someone will get a good deal.