mine will only vibrate (only sometimes) when its set really high and there is alot of bass in a song. my headset jack appears to be solid. try setting the volume down alittle on the speakers.
Yeah some people just are used to a certain way of doing things, itunes is very very simple to use and set up, and alot of people are now used to it. So anything other then that they don't like nearly as much because of that, but give it sometime.