Ahahaha, niced face marking, its cute. Yeah, the pics r small so I may be wrong about this but from what I can see in pic 2 and 3 her back hocks turns in... that's not good conformation. In the last pic you can see that her rump is quite... non-mussley (LOL) but I think that's a foal thing, she should fill out nicely when she's a bit older.
Conformation is about so much more than if the legs are straight.
I like her. She very well balanced with her hip and shoulder angles matching. Her neck ties in well to her shoulders, however I would like to see just a tad bit more length to her neck (could be the bad photos). I think she will do well for you! She's the type who will want to carry her neck level, just make sure you keep her legs correct throughout her training.
Overall she's a very good looking animal. What I can see with the provided pictures is: 1) little over at the knees 2) slightly cow hocked. But in general she is a very nice filly. Well balanced, and very pretty head and neck.
She has a sharp angled head and neck, it doesn't have a graceful curve, just straight. Her hind legs look really angled, like they are more under her than they should be? It's common for western bred horses to be cowhocked =]
I love her nice broad chest though =] She is pretty, good luck with her =]
Overall she's not to bad. I'm not digging those legs though. She is slighly sickle hawked and perhaps cowhawked as well. She also look over at the knees. I could be wrong on all of these it's hard to tell without correct conformation pictures.