i'm actually all for no classification. i'm sure you're all thinking:
? see, i'm the kind of person that looks for a game that has a room already hosted (I usually don't have enough time to create my own room and wait for people). so it's kinda a pain in the butt to have to expand all the categories, and find a game. instead, how about having a comment field next to the player's name in rooms mode so that the host can put their own comment (whether or not it's modded, etc).