Quote - A sensible balance between modelled in detail and polygon count.  For example, there's a superb free model of the Batman Begins/Dark Knight Batmobile which is almost unusable because of the enormous poly count.

If I had the resources I'd reconvert the model and get rid of a lot of the poly weight and replace it with textures, transmaps ans displacement maps.

Another thing which gets my goat is the practice of naming materials such as Mat 1, Mat 2 etc.  Meaningful names, pretty please.

Sensible mapping and material groups are always welcome.  There is at least one vendor here and at DAZ who has the most unfriendly texture layouts.  A shame because the models are really good but the textures are not great and changing them myself is a huge pain in the rear end.

On the subject of textures and so forth, there is absolutely no excuse to leave Reflect_Lite_Mult enabled.  Also, if you must provide fake reflections on surfaces like corneas, give us a way to turn them off.  If you provide a MAT with AO enabled, povide one without.

Hear-hear!!! Jeez, I wish more vendors came in here and read these basic things-to-do... alas, most can't be bothered. Diffuse_value of .8 too much to ask? I spend more time fixing this than anything else.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks