I just finished up my list of the ten must-have WADs for every Doomer, which I'll probably post here on December 31st or so. Naturally, a lot of the WADs I picked won't be much of a surprise, but I think it's quite a nice one. One thing I noticed while choosing exactly which WADs I thought deserved to be on the "must-play" list: there were quite a few great ones I reluctantly had to pass over. What's on your must-play list of Doom/Doom 2 WADs? If you have more than ten, wht criteria would you use to pare down the list?