And sometimes there is a place for really detailed descriptions too. If those specific details matter to the plot, or if you are writing in the perspective of someone who is attracted to the character you are describing, then it makes sense.

I suppose most of the time, I go at it in the same way I think of people when I see them in real life. Height and weight only come to mind if they are noticeably different, and what I note the most will ultimately be one or two unique features. If they are especially unassuming, I might not notice anything, and likewise an unassuming character might end up with no descriptions at all. Conversely, if I were to write a description based on [@Altered Tundra]'s J-Law signature, i'd probably end up going into more detail because i'd be noticing more detail... for blatantly obvious reasons. 

Of course, none of that matters if you don't write in any sort of character description at all, but that is my two centers anyway.