For CS, I'm not the type who can be 'ok' with an image dump and that's all to the character's appearance; I prefer at least a brief description, because sometimes it can reveal a little more than just the outward look of the character i.e. the choice of clothing, some little habits that give hints to the character's personality or ethic, etc. For numerical values, I'm more concerned with height than weight: for weight, generic adjectives to describe the build and statue of the character is good enough for me, while for height the value can give me a better gauge of the height difference between the characters, especially when the characters are talking to each other or certain actions where the height difference may be a prominent factor.

In IC, I agree that going into details about the character's look is not necessary, and if overdone may affect the flow - which is why I'm more inclined to do that in the CS rather than ranting about it in IC.