One thing I noticed that is pretty consistent in the inflation genre is that the inflation is relatively rapid. Occurring over seconds, minutes, occasionally hours. But you never see any stories involving inflation that takes over days, weeks, or months.
For some reason, I like the idea of a person expanding at like 1/4" per day. I think it's partly because part of the enjoyment for me is trying to do everyday things while expanded. The rapid expansion never seems to get into that.