For me it isn't the actual Apple Product - more those god awful white things that ship with Apple products that they have the nerve to call "Earphones". They must be the leakiest, poorest sounding Earphones/Earbuds/Headphones (Whatever you want to call them!) available. I reckon the ones I used to buy as a 7 year old for 99p from the market were of better quality.
Here's a clue - if I can hear 'tsssst, tssst, tsst' coming from your 'cans' through my 'noise isolating' Sennheisers....whilst you are sitting 10 yards further down the carriage from me, you've either got it too loud or you must be wearing Apple earphones - it's usually the latter.
I have seen numerous people ask the offenders to turn their music down, only for the offending person to get the right hump as if to say "don't you know these are Apple earphones?" (In some cases I have seen people told to "just **** off!" when they have asked politely for music to be turned down!!!).
In case you couldn't tell - this is a pet peeve of mine!

, so here is a polite plea to Apple users everywhere......
BUY SOME DECENT HEADPHONES!!!!!