For managers, the bonus is that you'll get a good sense of the relationship selling power of your team. For reps, you'll get fresh ideas and tips to help you build stronger ties to advertisers. You probably had very little trouble coming up with descriptive words and phrases that you link to these personalities. Reps arrive on time for appointments. Reps send thank-you notes when they get business.
Reps come in prepared for calls, respectful of client's time.
Reps deliver on their promises and on their deadlines. Reps sell what clients need, not just the latest special. Reps know how to use the client organization as well as their own internal resources and people to make things happen. Reps anticipate needs and make things as easy as possible for clients to work with them. Reps treat clients as individuals.