What are the qualities of a good educational technology trainer?

Whilst in the process of designing a unit of online learning I started thinking about the qualities and skills that a good educational technology trainer should have. After thinking of a few myself I decided to draw on the wisdom of my PLN and crowd-source a few more ideas.

Please feel free to add your ideas and to copy any of the ones you find here. I'd also like you to selectively vote for the ones you think are most important. You can also add some pros and cons to say why. You can add your ideas and comments without registering.
Thank you for your help and participation. I hope you find this list useful.
Best
Nik Peachey