I dissagree on several choices made, but this is MHO.
Gothic was really very good. What can be better than Gothic in 2003?
DeusEX sucked, even graphics. Okey okey shadows were good.
Worst moment. I think that was the moment when most expected games, (blockbusters) were planned for release, but all postponed.
And btw, wasn't that October when Half-life game and code leaked? I think they also planned to release it in October.