A couple of genre changes / additions would be helpful for classic video games:
1) Board game and Trivia should be separate genres. I'm not sure why those are combined. If it's a game like Trivial Pursuit, select both. For a game like Professor Pac-Man (which isn't a board game) it would be just Trivia. For Monopoly, it would be just Board Game.
2) Light Gun and Shooter should also be decoupled. There are a fair amount of very old arcade games, like Skeet Shooting or Duck Hunt which are light gun games but not properly shooters. Duck Hunt would be Light Gun and Hunting... which should be a genre. There are a good number of Hunting games.
3) BBS. There should be a category for the big BBS games of the 90s, like Barren Realms Elite, etc...
4) ASCII. I know that ASCII isn't a genre per se but neither is text-adventure (which properly have genres like sci-fi, etc...). This is for games like ZZT and Rogue. There are actually a good number of notable ones.
5) Graphical text adventure. This is distinct from text adventure, which is your Infocom style game. Wizard and the Princess or similar. These, admittedly, could fall under the current text category, but these genres are distinct enough that having them databased separately would be useful for searches for one or the other.
6) Under themes, a catch-all Military should be a theme, for those that don't fit into Modern Military or WWII. Games like Valiant Hearts would fall into this, or games that are non-specific but aren't medieval or modern.
7) Food/Drink under themes. There are a good number of these. Burgertime, Tapper, Food Fight, cooking games, etc...
8) Circus under themes. This would include games like Circus Atari, CarneyVale, Circus Charlie, Fiendish Freddy's Big Top, Circus Games, Big Top Barney... (there are a LOT of circus themed games)
9) Pirates under themes. There must be a zillion of these.
10) Something under genres for pet simulator type games. Like Nintendogs, tamagochi, that dreamcast sea monkey thing, etc... maybe even Little Computer People
That's it for now.