I've observed a number of different ScrumMasters facilitating a number of scrum teams and I thought I would summarise the most common pitfalls/bad habits I see most ScrumMasters fall into. By no means am I perfect either, as some of these I even notice myself doing!!!

• The "Top and Tail" ScrumMaster. Someone who always speaks first or last (or both) at the daily scrum meetings.
• The "Alarm Clock" ScrumMaster. Someone who calls the start of the daily scrum meetings every day without fail.
• The "Secretary" ScrumMaster. Someone who always updates the scrum artifacts themself.
• The "Iconic" ScrumMaster. Someone who calls the team to worship (around their desk) for a daily scrum.
• The Step-ScrumMaster. Someone who is ScrumMaster-ing another team and likes to think they spend enough time with both, but really they don't.