It can be SO hard to communicate your reaction to something visual using words. Whether it's negative, or positive, the words many of us come up with are often not very useful for creative direction.  But it is possible, if you can remember just a few rules (8 of them, conveniently listed here), to get the very best outcome from the feedback you give the designers you work with.
     Very few people - including designers - give really good design feedback. Good feedback should be actionable, but not prescriptive. Good feedback will help the entire team participate in the design of a product, and share the responsibility of  success, without creating ‘design by committee,’ which is a common way designs get derailed. Feedback that is given and received well should improve the customer experience, while allowing each person to add valuable insight.

The 8 Rules for Better Design Feedback

So much of what moves us forward -- or holds us back -- in any job is about relationships. And core to building healthy relationships -- or repairing damage -- is about how we communicate. Inevitably in mentoring sessions, this book comes up as a suggestion for common problems that arise at work. Whether the issue at hand is with a managers or co-worker, a spouse or family member, the techniques in this book are relevant to every situation. I've had multiple people thank me for referring this book to them, and I am grateful to the wise person who referred it to me. This is one of those book I still return to, in fact I bought it in both kindle and paperback formats because I like to quickly thumb through paperback when I'm looking for something in particular, but I like having the convenience of Kindle with me everywhere.

​Crucial Conversations: Tools for Talking When Stakes Are High