Well these may not be good categories but some topics I would like to see are:
Sprite Pooling - efficient reuse of sprites
Path Management - Splines, etc.
Classics - dicussing the classic shooters and how they are implemented, for instance understanding the wave mechanics of Galaxian enemies
Playability - how to turn an OK game into a really fun game via play mechanics
Games Options - what should be included for players to change the behavior of a game
Members Games - An area for people to create threads for discussing their games and how they might be improved
Frameworks - provide and area for poeple to post frameworks for shooter games and/or useful code snippets.
Sprite Pooling - efficient reuse of sprites
Path Management - Splines, etc.
Classics - dicussing the classic shooters and how they are implemented, for instance understanding the wave mechanics of Galaxian enemies
Playability - how to turn an OK game into a really fun game via play mechanics
Games Options - what should be included for players to change the behavior of a game
Members Games - An area for people to create threads for discussing their games and how they might be improved
Frameworks - provide and area for poeple to post frameworks for shooter games and/or useful code snippets.