I don't believe in term limits for any office, be it TalkBoard or the U.S. presidency. This is not to protect the officeholder, but rather to protect the voter -- he should have the right to cast his ballot for any person who wants the office.
That said, I believe that a change in TalkBoard's make up is generally a very healthy thing. It brings in new people with fresh ideas.
Last year, I voted for (and publicly endorsed) Gleff for a third term in office. For me, it was an exceptional decision -- and I did so only because I consider Gleff to be a very exceptional person.
I can't think of any other person I would have voted in for a third term. (I consider the year I spent on TalkBoard as a full term. This would be my second if I am elected. I will not run for a third term -- and should I ever go back on this, you are all free to throw that statement in my face.)