(a) if the thing's anamorphic;
(b) what's up with Greedo's subs -- hard or soft, font, size, colour, accuracy, etc.;
(c) if the menus suck or not -- and what to look for when the disc's fired up, to be able to tell different versions apart; and
(d) some technical details, like sharpness, colour, blown-out whites, crushed blacks, noise, etc.
I think most of that could be distilled to just two or three caps for the first film, and maybe two for each other film. Seven screen caps -- OK, say a maximum of 10 -- to more or less define a set would be acceptable, wouldn't it?