"Outstanding writing skills"Here's why. If you have great writing skills, I'm going to see them in the cover letter. You don't have to tell me they're there. If I care about candidates' writing skills (and oh, how I do), I'm going to be looking for them in your cover letter and other communications anyway.
"Highly conceptual and great at expressing ideas in a fresh, new way"
"Able to present strategic concepts in clear, persuasive, technically sound writing"
But all too often, candidates give me their own assessment of their writing skills. And when it doesn't match up with the not-so-great cover letter they've written -- which is often the case -- now I'm doubting the other subjective statements they have on their resume too. If they're wrong about their writing skills, why wouldn't I think they might be wrong about other skills they're claiming for themselves?
Frankly, I don't like any subjective statements on a resume. As I've written before, resumes should present factual information about what you've done, not subjective self-assessments. That's because I don't yet know enough about you to have any idea if yours is reliable or not.
Telling me that you're a fantastic writer when I can see that you're not pretty much answers that question for me, and not in a good way.
Now, you might think, "But since I know that I am a great writer, it's okay for me to do this." And maybe you really are (although a lot of people think they are when they're not). But you still shouldn't do it. If you're a great writer and you want me to know that, write a great cover letter. That's how I'll know.