I love the original BattleTech material but the attached MechWarrior RPG doesn't do much for me. Sometimes I think about adopting a bunch of material into Mekton Zeta, using the Japanese B-tech artwork and running a game about the brave large-eyed heroes of House Kurita fighting evil across the Inner Sphere. One of the background themes of the campaign would be the way American and Japanese culture appropriate each other. The foreground of the campaign would be about giant robots exploding.
Andy Hopp's Low Life is one of the few gamebooks out there perfectly blends good writing and great art. Also, it is one of the stupidest settings you'll ever find. It's a Savage Worlds book. There's nothing wrong with Savage Worlds that punching Smilin' Jack in the face won't fix. In fact I once used some old Gangbusters material to run a pretty dang fun Savage Worlds-powered gangster game. But I don't want to teach it to my current crop of players and I'd just as soon use Mutant Future for most post-apocalyptic shenanigans.
Incidentally, S. John has been working on a systemless 3rd edition to Uresia for a while now. In the meantime there are some goodies for the setting over at his Cumberland Games & Diversions website.
Anyone else have any settings they'd prefer to yank from one game and import into another?