I am curious to hear from the other moderators too; is the code of conduct for a moderator on here (is there one?) identical to that of regular posters?
There is no set in stone code of conduct for moderators on this particular forum, other than what every forumer should adhere to. People aren't specifically told how they should or should not behave from now on, when they are taken on as mods.
However, I do see the point you're getting across here. Though it's not set in stone, of course the most desirable moderator on any forum would be one that is very sensible, very mature with how they come across and one that stays out of argumentative banter even when discussing Tennis. Yes, the perfect candidates would be willing to sacrifice the full freedom of discussing Tennis as a forumer. It's one of those things that to a certain extent goes without saying. But, and that's a big butt; on this forum moderators are chosen primarily for their willingness and ability to sensibly moderate the forum while staying completely unbiased with their decisions. This is vital. Completely staying out of banter and heated Tennis discussions is far down in the list of importance.
If you see a moderator showing passion for the game or their favourite players, that's just them taking on their forumer role in the forum- it in no way is indicative of how they are in their moderator role.
Everyone here wants to actively engage and participate in the activities and discussions in the forum, and if you take that away from moderators it's unlikely any opinionated fan of Tennis would want to moderate this forum. I know you've received some stick for asking this question, but it's a fair point and I respect your opinion on it.