It's that time of year again; time to raise a toast to the venerable DOOM. Blue's News has a nice comment about DOOM. Also, check out DoomWorld for the official site celebration.
I don't really have anything new to say except that working on DOOM was still one of the true highlights of my gaming career. Until you actually work on something as tremendous and magical as DOOM you have no idea what that feeling is like. We totally knew we were making something really special and beyond our previous games which in themselves were groundbreaking as well (Commander Keen; Wolfenstein 3D). I was fortunate enough to experience all that with my friends at id and it was truly awesome.