I  *once*  owned  some  good  in-ear headphones. Of course, they broke
  after some years. I never found headphones like that again. They  were
  some cheap ones, I don't even know the manufacturer.

  Today,  I  bought  a pair of Sennheiser MX 271. Boy, that's what I was
  looking for.

    1.  Only 10 euro.

    2.  Reasonable sound quality. They aren't studio headphones but they
        sound good. No "tinny" crap.

    3.  Comfortable  to  wear.  It's  a "special design" for small ears.
        Well, I guess they're just some millimetres smaller than regular
        in-ear headphones.

    4.  A  black  cable.  Why the hell are there so many headphones with
        *white* cables?

    5.  A long cable.

    6.  An angled plug.

  I guess I'll buy some more tomorrow. Just in case.