I recently discovered the keyboard shortcut for metacity's "full screen" option, where a window is fully maximised with titlebar and border hidden. I like this mode a lot, and for one of my systems would like to make it the default for all new windows. How would I do that?
See this post, which indicates how to do it interactively. My thought is that you may be able to write a script using wmctrl to monitor newly opened windows and set fullscreen on them. Then, just add this script to your GNOME startup.