The very best thing about her is her bone mass. IMHO, that's something that's sorely missing in stock horses these days.
As for the rest of her body, it's like everyone else has said, long back, thick neck that ties in low, very heavy shoulder, upright shoulder.
She's very wide through her chest with a wide base under her (her legs have a big space between them where they come out of her shoulders), which I like in a horse. Her front legs appear to be straight and clean with good angles which is good since she's so front-heavy.
Her hind end is rather unfortunate though with the exceptionally steep croup, straight stifle, and prominent sickle hocks...but so long as she enjoys her job and ya'll enjoy riding her, then who cares