I'm not saying it's profound, but it's not quite merely hijinks either. I was hoping to find some unnamed Venn overlap among the strange components, or possibly artifact, of Gamma World, and I think this session (#5) shows that we're standing in it.
Some its components include how our characters talk to one another, in terms of what each regards as "normal" and finds not-quite-right in the other two; and how we as people talk to one another during play. These are two different things with a curious reinforcing effect between them. Granted, this is always the case for any good role-playing experience, but this time, the way they overlap or reinforce one another has a strange quality: aloof and witty, but also unconditionally buying into what the characters want or are like, their inner lives perhaps.
The obvious manifestation is that against all stereotypes of 4E characters being ciphers with movement rates and damage-dealing scores with abstract qualities and nothing else, each of our characters is uniquely liked by the other two players. To me, Geiger and Layka are not potato chips for the game to gobble down and replace with whoever each player has next on their stack - strangely, I care about them a lot as we're playing. It's evident that Ockmah is the same for Helma and Tazio, and at the risk of some sentimentality, it feels nice to play this way.
As people have seen from the beginning, Tazio prefers that his image is masked for the videos. Acknowledging that this is absolutely his right, with no argument or pushback from me about it, I ask you (the viewers) to understand that a lot of our play-experience in this game is defined by glances. In session 5, especially, there are a bunch of verbal interactions which only make their complete sense if you can see the way all the players look at one another, 1:1 in turn, during or just following the exchange. So you're missing one of the corners of this interaction; you might see me or Helma smile or make some mugging-type facial expression, but you're missing that Tazio gestured or made a face too, or that his expression prompted some verbal response which looks like it's coming out of nowhere.
I have some more thoughts on whether degrees of unplanned satire or pathos lurk in our content, especially effective because they aren't explicit or overly-discussed, but maybe that should wait. I'm also seeing some elements of 4E combat which are aiding our process (story, character, whatever you want to call it) and some which get a little laborious ... although as it happens, the fact that I rolled absolute crap for damage three times in a row, actually added something to our fight, by bringing out Layka's protectiveness. This system differs from core 4E by eliminating Feats and adding more unpredictable damage outcomes, and I think those are both good features. The troublesome features require a bit more thought for me to articulate, and it may be a function of not clueing into certain tactics well enough yet.