Forgot about this thread... I should probably answer it >.>

For the height/weight issue, I really didn't mean for it to sound like I want people to write "John is 6'4" and weigh 140 pounds" sort of stuff, even though I do realize in hindsight that that was how it came off... The point I was trying to make was that it differs what height is considered short/normal/tall and/or skinny/lean/normal/chubby/fat depending on your social circle, nationality and general perception of the world. I, myself, tend to use very colorful descriptions, I suppose. I'll write stuff like; 
"Although her meager height was barely enough for anyone to consider her an adult at first glance, the bulging masses of muscle moving beneath Jane's fair skin certainly did get the point across."
Or
"Even without the effect of his heels, John still towered about a head over most of his peers and his long, slender limbs did nothing to make him seem any shorter, but instead made him seem somewhat malnourished."
I know that my way of writing it is also up for interpretation and so on.

And with describing facial features, I don't mean for people to go down and explain every little blemish or pimple or whatever, but that most people don't describe facial features at all and if they do, it's usually either with words like "John had sharp facial features", "Jack had a strong jaw" or "Jane had soft, warm features". I would at least like to know a little bit more than that, I guess. 
I write stuff like; 
"With almond-shaped eyes like Lily's, it was easy to see that she at least had some orient ancestry, even if the sky blue of her iris was from other genes. One would barely be able to tell that her eyelashes were as fair a shade as they were, due to the thin-rimmed glasses sitting on the narrow bridge of her button nose. It would be hard to ever catch her without a glimmer of warmth in her eyes and a smile playing on her thin lips, even on her bad days."
This as just written quickly and I realize that I could have transitioned better between various features, but I guess it does get the point across well enough...