Comment by cattlefarmer

Yes, the worst thing is the huge amount of decision making even over very minor details that has to be done all the time. Coding and maintaining the servers isn't even that difficult. It's all the little stuff like scheduling with clients/vendors suppliers, wondering when is a good time to chase that invoice, which words to change in your proposal for this client, and so all. If you have employees, how to manage them, how to review their work, how to mentor them. It really is death by a thousand paper cuts.