Which Soft Skills Do You Consider the Most Important?

The discussion about soft skills and their significance in engineering fields is getting more attention. Soft skills such as active listening, interpersonal skills, emotional intelligence, conflict resolution, negotiation, and the list goes on... are becoming increasingly important and strategic. Engineers are no longer confined to their cubicles within reams of sheets of drawings and calculations.

Engineers are out in the field discussing needs and capabilities with clients, leading technical meetings, discussing details with suppliers and vendors and communicating with other professionals across the globe using collaboration tools such as instant messaging, IP conferencing and real-time audio and video communications.

Which ones in your opinion are more important than others?