As far as I know, thicker (and maybe darker?) broth is more nutritious because it contains more gelatin and stuff from the bones. I made broth the other day and after cooking it overnight in the Crockpot, I took the chicken (thighs) out, let them cool, stripped the meat from the bones, cracked the bones to expose the marrow, and tossed the bones back in the broth to cook all day. The broth wound up very dark and gelatinous. And delicious.
Amelia, married to Bear since 12/31/04; our daughter Rowan was born 8/6/09; our daughter Sapphira was born 8/17/12; due with DD3 6/17/15 (but after one two weeks late and one three weeks early, I'm not expecting a due-date baby!)