Additional deck restrictions include the following:
Chaos (any deck that relies mainly, heavly or solely on summoning Chaos Sorcerer, BLS and/or Dark Armed Dragon), due to the fact that everybody seems to use this mechanic, meta or not, and it's tired and irritating.
Exodia, because it's the type of deck that encourages taking the pussy's way out of a duel.
Stall, because it, like exodia, encourages cowering 'till death, which gets you nowhere.
Burn, becuase people who rely upon effects to deal damage will leave themselves unable to make a decent name for themselves.
Meta: Basically any deck build that you'd see commonly and/or are considered "broken", such as: Elemental Dragons, Elemental HEROES and Mermail. (However, as with Elemental HEROES builds, there are some exceptions: the builds that you wouldn't see all the time).