Most of my figures are Nendoroid Petits, so the typical figure is 65mm tall. Other brands of SD figures have different heights and proportions, however I am lumping all of what I consider to be roughly compatible figures under the category of 2.5" (or 65mm) "scale" :P.
I first became interested in these figures as references for sculpting because they had a minimalist level of detail that still managed to portray the character in a convincing manner. Later on, when Super Dungeon Explore was released, I started thinking about using these figures for gaming purposes.
After all, with millions of these figures sold throughout the world, what do people do with them? Can they be content with having the figures just sitting on shelves and taking part in the occasional photo shoot? Why not give them more purpose as gaming miniatures?
Anyway, I'll probably just start with posting comparison pictures of the various figures, and add material on my gaming system when I get them better developed.