If elected, my criteria would be quite open. However, I would first do a check as to whether the new forum would be an overlap with any existing fora, or whether it could generate a splintering effect on an existing forum.
Other than that, I'm in favoring of giving a forum a chance, but to set certain evaluation criteria after a 3 or 6 month window, to determine whether the forum should remain.
It's about giving back. FT has giving me much in my short time here, and I want to give back as much as I can. It's also about the diversity, from a regional as well as a type of member view. TB should not be limited to long term members, moderators or North American users (as an example). It needs to be a representation of the community, because only then can it represent the views and the needs of the community.