Thanks for the edit SharpRM (sorry bout getting the spelling wrong :p ever think about using capitals in it like that?) but I think I've had quite enough of Snake's butt in every game after MGS....did you see those MGS4 gameplay previews? we had to look up his crotch AS he humped the floor to move forward. Kojima seems to enjoy giving Snake tighter and tigther underwear as he gets older O_o he says it's because we'll be staring at his butt for most of the game so he wants detail. Personally I'd prefer some creaces instead of Snake's buttcrack.
I know about the flipper-ish thing, but I happen to think that makes it look smoother...I like the effect, also I noticed what you did with the arms...I'm not going exactly the same way...I want to keep the shape of the arms a little less obvious so it doesnt look as his arms are bare, but I did change the arms so they didnt seem to change SO arbitrarily at every frame.