It's gotta be the release. Stuffing, inflation, whatever, there's the innate appeal of the belly growing by itself, but by far what I desire most is a well-executed culmination and payoff FOR that growth. This could be a great number of things: deflation, obviously, is a favorite of mine, though milage varies enough that it's not the end-all be-all for me; orgasm, of course; popping as a release has its place; and it could be as simple as that shirt button FINALLY giving out after straining to hold all of that gut down under it. I also like what great artists like Mabo or Imbapovi do, where their release is a typical big belly erupting into a bigger, full-body shape.

There are a lot of ways to do it! And I think it's the aspect that deserves the most love.