Im not sure if its the picture or my eyes playing tricks on me, but it seems like her back is a hair long.. how tall is she? Maybe im misjudging her height =) She has (from what I can see) a nice angle in her shoulder/pastern too. She looks like she has some good shock support, making her a very easy horse to "sit" on (not a springboard like my Appy, LOL). Again, im not sure if its my eyes playing tricks on me, but the back pastern seems a bit on the longer side.. it shouldn't be a biggie though, since the weightbearing legs are the front ones. My filly currently is overextended with her front pasterns, meaning the pressure of her body falls directly on the fetlock, because the pastern is too long and put the hoof too far away from the load bearing angle. So my filly chooses to stand with her feet slightly tucked under her body (see photo below), because it relieves the direct pressure on her fetlocks because of how her long pasterns set her hooves so far infront of her... (god, I hope I didnt confuse you, LOL!) If she were to stand square, her feltocks would have a huge strain on them from the weight. I think she will tighten up with age though, she is only 10 months =)
As fas as what disciplines she'd be suited for.. im sure she could be a well rounded "little bit of everything" horse. As far as a dedicated job for her... I can see that mare looking AWESOME in the Western Ring. Nice low Quarter Horse type head set (with that lovely long slender neck of hers), slow and easy, no bump in the ride for a smooth seat.. mmmhmm.. that's the stuff!