I went with Way Cool, as that seemed to be the only possitive option.
I run my game this way, for the most part, and don't have problems. Generally I own every book the players want to use anyway and I know them better than they do. Which, incidentally means I can toss slightly broken things at the party to keep giving them a run for their money.
I did have a DM who allowed a superheroes book in (Silver Sentinals I think). That was terrible for the rest of us. One palyer had it, along with a party going NPC, and the rest of us were out shined in every encounter. He, the DM, ignored us when we tried to bring up the problem.
But that book is obviously not balanced with the rest of D&D, nor does it claim to be. The WotC books generally are. If a player wants to add something from a third party, he will of course ask me and I'll look through it, making adjustments as needed. And, as Nyeshet said, he better darn well bring the book with him or buy me a copy.
RobotRobotI said:
On the other end of the spectrum, a DM who allows only certain supplements tend to frustrate me... game I'm in allows feats from like, Complete Warrior and all the Eberron stuff, but playing a Cleric, I feel neglected.
He doesn't allow the whole Complete series? Yeah, that does suck for you. I remember playing a Druid as my first 3.0 PC. It was about a year after that Masters of the Wild came out. I eked out every bit I could get until then.