What we do:

• Be friendly and polite - be kind to your players, help them build something, maybe even protect their house from griefers.
  
• Be able to answer questions - Know your plugins! No one likes a server admin who doesn't know how to use half of their plugins.
  
• Be able to tolerate insults - One thing that many admins will do is rage quit when a "butthurt jerk" insults all of their work. So what if someone insults you? Ban them, and move on!