My takeaway from Gamma World: I wouldn't want to play an entire campaign, because it's just a little too gonzo for me, but I think three or four sessions (would you call that a mini-campaign?) as a break from my regular game would be perfect.I found it somewhat interesting not because of what he says about Gamma World (one wonders what he'd make of Mutant Future), but rather because of what he says about mini-campaigns. I've done one-shot games, mostly at conventions, and I've of course done long campaigns, but I've never actually set out to do a game that would only last three or four sessions.
How about you? Am I just too caught up in the sandbox/megadungeon paradigm to see the appeal of the mini-campaign?