The more you play and build decks too, the more you realise how hard it is to find the balance between fun and competitive.
For eg, as soon as someone starts doing well most every game, they start thinking that maybe it is too good. But that happens a lot.
And then certain cards seem rediculous but, really they often don't do a whole lot. I am often pulling out odd cards that people go Whaaat? but then it doesn't end up being all that important in the game.
All these things are so hard to make hard and fast rulings on. Hence I think why we gave up trying to make our own ban list.
I do like the idea of some 'common only' decks though for a different slant... what do you guys reckon?