Many writers have the habit of dedicating all their talent to writing for others, and invest only a little of it in building their own business. I've heard that happen with plenty of writers, and all of them regret it.
However, my prime vexation is when clients limit your creativity. Many a times clients come to you asking for new style of writing, something not available on the web. They want new words, new style, new usage, and new caliber. And when the writer actually delivers the requirement, the client responds by saying "the phrasing is unusual." :rolleyes: All you're left to do is go back to the article, and make it usual. Although the client isn't disappointed, what I feel sad about is the fact that clients don't want to take chances with novelty.
As a result, I write differently for myself and my clients. When I'm writing for myself, I can delve into the sea of words, and bring up pearls; but that is not possible when you write for others.
What is your primary dislike when you offer your writing services?