You have to satisfy users' needs to make a successful company, and it is very unlikely that the stuff you have to do to satisfy users' needs also happens to be

You have to satisfy users' needs to make a successful company, and it is very unlikely that the stuff you have to do to satisfy users' needs also happens to be exactly what you'd most like to work on, even if you're the specialist in that problem. Banks are a good example, though. What irritates me most about banks is not having to figure out how their merchant services work but that they bring a slow, ineffective communication factor into the equation. I would probably dislike dealing with banks for the same reason I dislike trying to make changes in a big company: everything's rolling on a different track from a hacker's viewpoint and the very communication that could bridge that together and bring everyone on the same track goes forward very, very slowly.