Checking my FNG4GB.log, the log ends abruptly through the menu checks. ini files and deleted the originals to force the game to make new ones.
I've told Steam to uninstall and then reinstall everything. Disabling all mods does nothing except launch the new game so fast, I don't even see the NCR Ranger splash. Specifically, I launch the game, I get the opening splash screens, and when I get to the picture of the NCR Ranger, instead of getting my menu options, it jumps straight into starting a new game, and then crashes after I've okayed all the new game one-offs from mods. Unfortunately, my 'superpower' has struck again, and like many other 'unbreakable' things that I've broken, I have no idea what I did, it's just borked. I've been bitten by the random urge to play New Vegas again.