My boss often says "To be interesting, be interested." When I meet with a team member for coffee, I ask subtle questions about that person's personal background, as well as about their professional background. I learn about their families, where they are from, where they went to school and sometimes what they do for fun. That way, I can describe them as people, not just as "task doers." In my opinion, that makes them sound more appealing to meet from a cient perspective. It makes the person I am describing sound human. People want to do business with people they like, but also those they may have something in common with or who seem interesting. I try to find small things that make people I refer sound attractive, other than just their skill set. This practice also makes me seem like know the person I am referring, and I think that makes my referral more credible.